The best humic acid fertilizers depend on how you plan to apply them: my best overall pick is GS Plant Foods Liquid Humic Acid Soil Amendment for its leonardite-derived liquid format and broad soil-amendment use. The Andersons Humic DG stands out for treating larger areas with a granular product, while Wallace Organic Wonder DS-80 suits buyers who want a soluble humic-and-fulvic powder. The main tradeoff is convenience versus coverage: liquids are easy to measure and apply, while powders and granules can fit larger jobs or specific mixing routines. Some products also pair humic substances with nutrients or seaweed, so they are not interchangeable with a humic-only amendment. Read on for the full comparison and help matching a product to your soil, equipment, and application plans.
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Key Takeaways
- Liquid concentrates lead for flexible routine use: GS Plant Foods’ gallon-size liquid is my overall pick, while its 32-ounce concentrate offers a smaller format for buyers who want to try the same brand’s approach.
- Large-area lawn care favors granules: The Andersons Humic DG is the standout for buyers equipped to spread dry amendments, unlike the lineup’s many hose- or spray-oriented liquids.
- Humic-and-fulvic powders fill a distinct role: Wallace Organic Wonder DS-80 is aimed at buyers who want both substances in a soluble powder rather than a ready-to-use liquid.
- Package size changes the buying decision: Bloom City offers 8-ounce, 32-ounce, and gallon formats, letting buyers choose a smaller trial size or a larger supply without treating the products as different formulas.
- Not every lawn product is a humic-only amendment: Simple Lawn Solutions 15-0-15 adds fertilizer nutrients, and its Seaweed and Humic Acid Concentrate combines ingredients, so buyers should match the label to their actual goal.
| FoliarTech Organic Humic Acid Soil Conditioner, 1.1 Gallons |  | Best for Large-Area Liquid Application | Form: Liquid | Volume: 1.1 gallons (135.26 fluid ounces) | Source material: Humalite from Alberta, Canada | VIEW LATEST PRICE | See Our Full Breakdown |
| Simple Lawn Solutions 15-0-15 Liquid Lawn Fertilizer, 1 Quart |  | Best for Humic Acid Plus Lawn Feeding | Form: Liquid | Volume: 32 fluid ounces (1 quart) | NPK ratio: 15-0-15 | VIEW LATEST PRICE | See Our Full Breakdown |
| GS Plant Foods Liquid Humic Acid Soil Amendment, Leonardite-Derived, 1 Gallon |  | Best for Broad Plant Compatibility | Form: Liquid | Source: Leonardite | Volume: 1 gallon (128 fluid ounces) | VIEW LATEST PRICE | See Our Full Breakdown |
| Farmer’s Secret Organic Soil Revitalizer, Liquid Humic Acid Amendment, 32 fl oz |  | Best for Measured Monthly Soil Care | Form: Liquid | Volume: 32 fluid ounces | Weight: 12.8 ounces | VIEW LATEST PRICE | See Our Full Breakdown |
| PowerGrow Systems Humic Acid Fertilizer and Soil Conditioner, 5 lb |  | Best Powder Option for Soil Amendment | Form: Powder | Weight: 5 lb (80 ounces) | Model number: HUMIC-5LB | VIEW LATEST PRICE | See Our Full Breakdown |
| GS Plant Foods Humic Acid Soil Amendment, Liquid Concentrate, 32 oz |  | Best for Organic Program Compatibility | Form: Liquid concentrate | Source: Leonardite | Organic listing: OMRI Listed | VIEW LATEST PRICE | See Our Full Breakdown |
| Bloom City Humic Acid Liquid Soil Conditioner for Plants and Lawns, 32 oz |  | Best for Compacted Soil | Form: Liquid | Volume: 32 fluid ounces | Weight: 2 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| The Andersons Humic DG Organic Soil Amendment, 40 lb |  | Best for Large Lawns and Broad-Area Treatment | Form: Granules | Weight: 40 pounds | Coverage: Up to 40,000 square feet | VIEW LATEST PRICE | See Our Full Breakdown |
| Bloom City Humic Acid Liquid Soil Conditioner, 8 oz |  | Best Compact Pick for Indoor Plants | Form: Liquid | Volume: 8 fluid ounces | Mixing ratio: 1:5120 | VIEW LATEST PRICE | See Our Full Breakdown |
| Farm Made Organics Humic+ Liquid Humic Acid Soil Conditioner, 32 oz |  | Best Multi-Ingredient Liquid Blend | Form: Liquid | Humic acid concentration: 5% from Leonardite | Additional ingredients: Fulvic acid, sea kelp extract, and soluble potash | VIEW LATEST PRICE | See Our Full Breakdown |
| Bloom City Humic Acid Liquid Soil Conditioner for Lawns and Gardens, 1 Gallon |  | Best for Large Lawn Areas | Brand: Bloom City | Form: Liquid | Volume: 128 fluid ounces (1 gallon) | VIEW LATEST PRICE | See Our Full Breakdown |
| Humic Acid Fertilizer and Soil Conditioner, 10 lb | | Best Value Granular Format | Brand: PowerGrow Systems | Form: Granules | Weight: 10 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| Wallace Organic Wonder DS-80 Soluble Humic and Fulvic Acid Powder, 1 lb |  | Best for Versatile Liquid Applications | Brand: Wallace Organic Wonder | Form: Water-soluble powder | Weight: 1 pound (16 ounces) | VIEW LATEST PRICE | See Our Full Breakdown |
| Down To Earth Organic Granular Humic Acids, 5 lb |  | Best for Organic Gardens | Brand: Down To Earth All Natural Fertilizers | Form: Granules | Weight: 5 pounds (80 ounces) | VIEW LATEST PRICE | See Our Full Breakdown |
| Simple Lawn Solutions Soil Hume Seaweed and Humic Acid Concentrate, 32 fl oz |  | Best Humic-and-Seaweed Blend | Brand: Simple Lawn Solutions | Form: Liquid | Volume: 32 fluid ounces | VIEW LATEST PRICE | See Our Full Breakdown |
| humic acid fertilizer | Form | Volume | Weight |
|---|---|---|---|
| FoliarTech Organic Humic Acid | Liquid | 1.1 gallons (135.26 fluid ounces) | — |
| Simple Lawn Solutions 15-0-15 | Liquid | 32 fluid ounces (1 quart) | — |
| GS Plant Foods Liquid Humic Ac | Liquid | 1 gallon (128 fluid ounces) | 8 pounds |
| Farmer’s Secret Organic Soil R | Liquid | 32 fluid ounces | 12.8 ounces |
| PowerGrow Systems Humic Acid F | Powder | — | 5 lb (80 ounces) |
| GS Plant Foods Humic Acid Soil | Liquid concentrate | 32 fluid ounces | — |
| Bloom City Humic Acid Liquid S | Liquid | 32 fluid ounces | 2 pounds |
| The Andersons Humic DG Organic | Granules | — | 40 pounds |
| Bloom City Humic Acid Liquid S | Liquid | 8 fluid ounces | — |
| Farm Made Organics Humic+ Liqu | Liquid | 32 fluid ounces | — |
| Bloom City Humic Acid Liquid S | Liquid | 128 fluid ounces (1 gallon) | 8 pounds |
| Humic Acid Fertilizer and Soil | Granules | — | 10 pounds |
| Wallace Organic Wonder DS-80 S | Water-soluble powder | — | 1 pound (16 ounces) |
| Down To Earth Organic Granular | Granules | — | 5 pounds (80 ounces) |
| Simple Lawn Solutions Soil Hum | Liquid | 32 fluid ounces | — |
More Details on Our Top Picks
FoliarTech Organic Humic Acid Soil Conditioner, 1.1 Gallons
FoliarTech stands out for buyers who want one humic-and-fulvic-acid concentrate for broad lawn or garden use. Its 1.1-gallon size and stated spray coverage of 43,500 square feet suit larger treatment areas better than the quart-size Simple Lawn Solutions 15-0-15, which is a nutrient fertilizer with humic acid rather than a dedicated soil conditioner. The OMRI certification and water-soluble liquid format also give organic growers flexibility to apply it as a soil drench or foliar spray. The tradeoff is that the label supplies the mixing ratio, so buyers cannot plan dilution from the provided product details alone. Its listed target species are lawn grasses, even though the description presents broader plant uses; gardeners wanting clearly defined all-purpose guidance may prefer GS Plant Foods Liquid Humic Acid Soil Amendment.
Pros:- OMRI-certified humic and fulvic acid concentrate made from Humalite
- Can be applied as a soil drench or foliar spray
- Water-soluble for use with sprayers and irrigation setups
- Stated spray coverage of 43,500 square feet
Cons:- Mixing ratio details are on the bottle label rather than in the supplied specifications
- Lawn grasses are the listed target species despite broader stated applications
- A large liquid container may be less convenient for small gardens or occasional use
Best for: Lawn owners and garden managers treating a large area who want an OMRI-certified liquid that can be used as a drench or foliar spray.
Not ideal for: Buyers who need a published dilution ratio before purchase or want a product whose listed target species clearly cover a wide range of garden plants.
- Form:Liquid
- Volume:1.1 gallons (135.26 fluid ounces)
- Source material:Humalite from Alberta, Canada
- Application methods:Soil drench or foliar spray
- Stated spray coverage:1 acre / 0.4 ha / 43,500 sq ft
- Irrigation use:2,000 L water irrigation
- Certification:OMRI-certified
- Target species:Lawn grasses
Our verdict“Choose FoliarTech for large-area liquid treatment and flexible application, but skip it if you need the dilution instructions or plant targets spelled out in advance.”
Simple Lawn Solutions 15-0-15 Liquid Lawn Fertilizer, 1 Quart
This is the lineup’s clearest choice for lawn owners who want humic acid alongside a defined nutrient blend, rather than a standalone soil amendment. The 15-0-15 formula supplies nitrogen and potassium without phosphorus, so it serves a different job from FoliarTech Organic Humic Acid Soil Conditioner, which focuses on humic and fulvic acids and covers a much larger stated area. Common sprayers or a watering can keep application accessible, and the listed grass types span several warm- and cool-season lawns. The tradeoff is that its humic acid is part of a fertilizer, not the product’s sole focus; buyers seeking a dedicated soil conditioner may prefer GS Plant Foods Liquid Humic Acid Soil Amendment. The listing also calls for sufficient watering and recommends using it within a broader fertilizer program.
Pros:- Provides 15% nitrogen and 15% potassium with no phosphorus
- Contains humic acid alongside potash and sulfur
- Works with hose-end, backpack, or pump sprayers and a watering can
- Lists multiple turf grasses as well as ornamentals and garden plants
Cons:- Primarily a nutrient fertilizer, not a standalone humic acid conditioner
- Requires sufficient watering for nutrient absorption
- The listing recommends use alongside a fertilizer program rather than as a complete feeding plan
Best for: Lawn keepers who want a phosphorus-free nitrogen-and-potassium feed that also includes humic acid and can be applied with common equipment.
Not ideal for: Gardeners seeking a dedicated humic amendment without added NPK nutrients, or buyers who cannot water after application.
- Form:Liquid
- Volume:32 fluid ounces (1 quart)
- NPK ratio:15-0-15
- Nutrient content:15% nitrogen and 15% potassium
- Phosphorus:None
- Contains:Humic acid, potash, and sulfur
- Application:Hose-end, backpack, or pump sprayer, or watering can
- Suitable plants:Turf grass, ornamentals, young plants, flower beds, potting soil, and trees
- Made in:United States
Our verdict“Pick this for lawn feeding that includes humic acid, but choose a dedicated amendment if soil conditioning is your main goal.”
GS Plant Foods Liquid Humic Acid Soil Amendment, Leonardite-Derived, 1 Gallon
GS Plant Foods is a strong fit for growers who want a dedicated, Leonardite-derived humic acid amendment with a specified dilution rate. Its 1:64 mixing ratio makes planning more straightforward than FoliarTech Organic Humic Acid Soil Conditioner, whose supplied details leave the ratio to the bottle label. OMRI Listed status and use across gardens, lawns, trees, and houseplants give it broader stated reach than Simple Lawn Solutions 15-0-15, which is better understood as a nutrient feed with humic acid included. A sprayer is the specified application method, so this is less flexible than products that also call out pour-on use. The main compatibility caveat matters: avoid mixing it with low-pH or high-calcium formulations. That makes it a less convenient choice for buyers who routinely combine amendments in a tank.
Pros:- Derived from Leonardite and intended as a dedicated humic acid amendment
- OMRI Listed for organic use
- Specified 1:64 mixing ratio helps with dilution planning
- Listed for lawns, gardens, trees, houseplants, and other plants
Cons:- Should not be mixed with low-pH or high-calcium formulations
- Sprayer is the stated application method, limiting flexibility compared with pour-on options
- The one-gallon container may be more than needed for small plant collections
Best for: Organic-minded gardeners and lawn or tree growers who want a dedicated liquid humic amendment with a stated dilution ratio for varied plant settings.
Not ideal for: Growers who regularly tank-mix products with low-pH or high-calcium formulations, or who need an application method beyond spraying.
- Form:Liquid
- Source:Leonardite
- Volume:1 gallon (128 fluid ounces)
- Weight:8 pounds
- Mixing ratio:1:64
- Application method:Sprayer
- Organic listing:OMRI Listed
- Specific uses:Plant growth, root development, and nutrient uptake
Our verdict“Choose GS Plant Foods for a broadly applicable, Leonardite-derived liquid with a clear dilution ratio, provided your other inputs are compatible.”
Farmer’s Secret Organic Soil Revitalizer, Liquid Humic Acid Amendment, 32 fl oz
Farmer’s Secret suits growers who prefer a simple, recurring soil-treatment routine. The 1 oz per gallon dilution and monthly growing-season schedule provide more application guidance than PowerGrow Systems Humic Acid Fertilizer and Soil Conditioner, whose listed mixing ratio is 1:0:0 and may need clarification. Its stated coverage of up to 32,000 square feet from a 32-ounce container also makes the concentrate practical for larger areas. Unlike Simple Lawn Solutions 15-0-15, this is a soil amendment rather than a nitrogen-and-potassium lawn feed; it is intended to support soil microbial activity, not directly feed foliage. That focus is a tradeoff for buyers wanting fast, clearly quantified nutrient delivery. It is OMRI Listed and can be sprayed or poured, but the required dilution adds a preparation step.
Pros:- OMRI Listed and made with activated humics from organic sources
- Specified 1 oz per gallon dilution provides a clear mixing guide
- Can be applied by spraying or pouring onto soil
- Stated coverage of up to 32,000 square feet
Cons:- Must be diluted before application
- Intended for soil application rather than direct plant feeding
- Monthly seasonal use may not suit buyers looking for a less scheduled treatment
Best for: Gardeners and lawn owners who want an OMRI-listed humic soil amendment with a set dilution and repeatable monthly application schedule.
Not ideal for: Buyers seeking a direct plant-feeding fertilizer, a ready-to-use product, or a humic treatment specifically designed for foliar application.
- Form:Liquid
- Volume:32 fluid ounces
- Weight:12.8 ounces
- Main ingredient:Activated humics
- Mixing ratio:1 oz per gallon (1:128)
- Application method:Spray or pour onto soil
- Stated coverage:Up to 32,000 square feet
- Certification:OMRI Listed
Our verdict“Choose Farmer’s Secret for scheduled, soil-focused humic treatments with clear dilution guidance, not as a substitute for a nutrient fertilizer.”
PowerGrow Systems Humic Acid Fertilizer and Soil Conditioner, 5 lb
PowerGrow Systems is the lineup’s powder-format pick for buyers who would rather handle a dry soil conditioner than store a liquid concentrate. The 5-pound screened powder is described as supporting nutrient uptake, water retention, microbial activity, root health, and seed germination, giving it a broad soil-focused purpose. Compared with GS Plant Foods Liquid Humic Acid Soil Amendment, it avoids a liquid container but lacks the liquid product’s clear 1:64 dilution ratio and sprayer instructions. Its own mixing ratio is listed as 1:0:0, which is not a useful application guide without clarification. That uncertainty makes it harder to plan use than Farmer’s Secret, which specifies a dilution and monthly schedule. This is a plausible fit for gardeners committed to a dry amendment, but buyers needing precise preparation directions should select a better-specified option.
Pros:- Powder format offers an alternative to liquid concentrates
- Screened for garden use
- Intended to support water retention and nutrient uptake
- Described as supporting microbial activity, root health, and seed germination
Cons:- Listed mixing ratio of 1:0:0 may need clarification
- No specific application method or dilution instructions are provided in the supplied data
- Coverage is described only as medium, without a quantified area
Best for: Gardeners who prefer a dry, screened humic soil conditioner and can confirm application directions before use.
Not ideal for: Buyers who need a clear mixing or application rate, or who want a liquid product for sprayer-based treatment.
- Form:Powder
- Weight:5 lb (80 ounces)
- Model number:HUMIC-5LB
- Specific uses:Organic
- Coverage:Medium
- Target species:Plants
- Mixing ratio:1:0:0 (listed; may need clarification)
- Number of packs:1
Our verdict“Consider PowerGrow Systems if you specifically want a powder, but choose a liquid alternative if clear mixing and coverage guidance matter.”
GS Plant Foods Humic Acid Soil Amendment, Liquid Concentrate, 32 oz
OMRI listing and broad plant compatibility give this Leonardite-derived concentrate a clear role for gardeners building humic acid into an existing organic routine. It is described as suitable for lawns, gardens, houseplants, and landscape plants, and it can be used alongside many fertilizer programs. Compared with Farm Made Organics Humic+, which adds fulvic acid, kelp extract, and soluble potash, this formula keeps the focus on humic acid and soil conditioning rather than a multi-ingredient blend. The tradeoff is that mixing needs attention: the product should not be combined with low-pH or high-calcium formulations. Its stated 2:128 mixing ratio also means buyers should follow the label directions rather than assume a ready-to-use application. Choose it for flexibility, not for a bundled nutrient boost.
Pros:- OMRI Listed for organic use
- Leonardite-derived humic acid supports soil structure and nutrient availability
- Suitable for lawns, gardens, houseplants, and landscape plants
- Can fit alongside many existing fertilizer programs
Cons:- Must not be mixed with low-pH or high-calcium formulations
- Requires dilution and careful attention to the stated mixing ratio
Best for: Organic-minded gardeners who want a liquid humic amendment for multiple plant types and already follow a fertilizer program.
Not ideal for: Buyers seeking a humic product to mix indiscriminately with acidic or high-calcium fertilizers, or those who prefer a formula that also supplies kelp and potash.
- Form:Liquid concentrate
- Source:Leonardite
- Organic listing:OMRI Listed
- Volume:32 fluid ounces
- Mixing ratio:2:128
- Application method:Spray
- Target species:Lawn
- Specific uses:Plant growth, root development, and nutrient uptake
Our verdict“Choose this for an OMRI-listed, broadly usable humic concentrate, provided your fertilizer mixtures avoid low-pH and high-calcium products.”
Bloom City Humic Acid Liquid Soil Conditioner for Plants and Lawns, 32 oz
Compacted soil support is the main reason to pick this 32-ounce liquid conditioner: its stated uses focus on loosening clay soil while supporting root strength, nutrient uptake, and water retention. It is aimed at both lawns and gardens, so it suits buyers who want one diluted product for those outdoor areas. Compared with the smaller Bloom City 8 oz bottle, this size is a more practical fit for recurring lawn and garden care; the smaller format makes more sense for indoor plants or limited treatment areas. The compromise is application prep: the concentrate must be diluted, and the product data does not provide a coverage figure to help plan how much a given yard will need. This is a straightforward soil conditioner, not a complete fertilizer or a ready-to-use spray.
Pros:- Designed to help loosen compacted clay soil
- Supports nutrient uptake and root strength
- Suitable for lawns and gardens
- Can be incorporated into regular lawn-care routines
Cons:- Requires dilution before application
- No coverage figure is supplied in the product data
Best for: Homeowners treating clay-heavy lawns and garden beds who want a liquid humic conditioner to add to a regular care routine.
Not ideal for: Buyers who need a ready-to-apply product, a stated area coverage estimate, or a compact bottle mainly for indoor plants.
- Form:Liquid
- Volume:32 fluid ounces
- Weight:2 pounds
- Mixing ratio:1:1000
- Intended use:Lawns and gardens
- Pack count:1
Our verdict“Pick the 32-ounce Bloom City bottle for routine lawn and garden soil conditioning, but look elsewhere if you need clear coverage guidance or ready-to-use convenience.”
The Andersons Humic DG Organic Soil Amendment, 40 lb
For buyers treating a large area, 40,000 square feet of stated coverage and a 40-pound granular format make this the most scale-oriented option in this group. Its 70% humic content gives shoppers a clearly stated concentration to compare, while the granules can be used alone or alongside a fertilizer program. That is a different proposition from liquid choices such as GS Plant Foods Humic Acid Soil Amendment, which suit buyers who prefer a concentrate they can dilute and spray across varied plantings. The granular format is better aligned with broad lawn or property applications than small indoor or container jobs. There are two notable limits: this is a substantial bag to store and handle, and the product is not for sale in South Dakota.
Pros:- 70% humic content is specified
- Covers up to 40,000 square feet
- Granular format suits broad-area treatment
- OMRI listed and usable alone or with a fertilizer program
Cons:- Large 40-pound bag takes storage space and effort to handle
- Not for sale in South Dakota
Best for: Property owners and lawn-care buyers treating broad outdoor areas who want granular application and a stated high humic content.
Not ideal for: Indoor gardeners, buyers with small treatment areas who do not need a 40-pound bag, or customers in South Dakota.
- Form:Granules
- Weight:40 pounds
- Coverage:Up to 40,000 square feet
- Humic content:70%
- Listing:OMRI listed
- Target species:Plants
Our verdict“Choose The Andersons for large outdoor applications and a stated humic percentage; skip it for small-scale or indoor use.”
Bloom City Humic Acid Liquid Soil Conditioner, 8 oz
Small-batch flexibility is the appeal of this 8-ounce Bloom City bottle. Its listed uses span indoor plants, gardens, and lawns, so it can serve a houseplant collection without committing to the larger 32-ounce Bloom City Humic Acid Liquid Soil Conditioner. The product is also described as helping with compacted clay, soil structure, water retention, and nutrient uptake, making it relevant beyond pots. Its 1:5120 mixing ratio calls for careful dilution, though, and the supplied coverage figures refer to 32-ounce and 128-ounce sizes—not this package. That leaves buyers without a direct coverage estimate for planning outdoor use. Compared with GS Plant Foods Humic Acid Soil Amendment, this is the more compact choice, but the GS product has a stated OMRI listing that is not specified here.
Pros:- Compact 8-ounce package suits limited treatment needs
- Listed for indoor plants, gardens, and lawns
- Supports soil structure, water retention, and nutrient uptake
- Described as helpful for hard-packed clay
Cons:- Requires dilution before use
- Coverage details are provided for larger sizes, not the 8-ounce package
- No organic listing is specified in the product data
Best for: Houseplant owners and gardeners who want a small concentrate for occasional soil conditioning across indoor and outdoor plants.
Not ideal for: Lawn owners planning broad applications who need package-specific coverage information, or buyers who want a stated organic listing.
- Form:Liquid
- Volume:8 fluid ounces
- Mixing ratio:1:5120
- Uses:Plant growth and soil conditioning
- Target species:Indoor plants, gardens, and lawns
- Country of origin:USA
- Coverage data:Figures supplied for 32-ounce and 128-ounce packages, not the 8-ounce package
Our verdict“Choose this compact Bloom City concentrate for occasional, mixed-use soil conditioning, but not for outdoor coverage planning.”
Farm Made Organics Humic+ Liquid Humic Acid Soil Conditioner, 32 oz
Humic acid plus supporting ingredients sets this formula apart from simpler concentrates. It specifies 5% Leonardite humic acid alongside fulvic acid, sea kelp extract, and soluble potash, creating a broader ingredient profile than GS Plant Foods Humic Acid Soil Amendment, which centers on Leonardite-derived humic acid and is OMRI Listed. Farm Made Organics also gives a suggested routine—dilute and apply every 2 to 4 weeks during the growing season—and names a wide range of plants, from lawns and vegetables to trees and indoor plants. That guidance can help buyers who want a repeatable schedule, but it also means mixing and regular applications are part of the job. The naturally earthy, kelp-like smell may be unwelcome before dilution, and the product data does not specify an organic listing.
Pros:- Contains 5% Leonardite-derived humic acid
- Adds fulvic acid, sea kelp extract, and soluble potash
- Suitable for lawns, vegetables, flowers, trees, shrubs, and indoor plants
- Can be applied with a sprayer or watering can
Cons:- Requires dilution before application
- Has a naturally earthy, kelp-like smell before dilution
- No organic listing is specified in the product data
Best for: Gardeners who want a liquid humic conditioner with fulvic acid, kelp, and soluble potash for a mixed range of plants.
Not ideal for: Buyers seeking an explicitly OMRI-listed product, a scent-free concentrate, or a no-mix application.
- Form:Liquid
- Humic acid concentration:5% from Leonardite
- Additional ingredients:Fulvic acid, sea kelp extract, and soluble potash
- Volume:32 fluid ounces
- Application method:Mix with water; apply with a sprayer or watering can
- Recommended frequency:Every 2 to 4 weeks during the growing season
- Target plants:Lawn grass, flowers, vegetables, trees, shrubs, and indoor plants
- Country of origin:USA
Our verdict“Pick Farm Made Organics for a multi-ingredient liquid blend and a stated seasonal schedule, but choose GS Plant Foods if an OMRI listing matters more.”
Bloom City Humic Acid Liquid Soil Conditioner for Lawns and Gardens, 1 Gallon
For buyers treating a lawn or garden across a broad area, this 128-fluid-ounce liquid format is the practical distinction. It is intended to help loosen compacted clay and support root strength, water retention, and nutrient availability, making it a soil conditioner to pair with a regular care routine rather than a complete fertilizer. Compared with the 32-ounce Simple Lawn Solutions Soil Hume, Bloom City supplies more concentrate in one container, but it does not add that product’s stated seaweed component. The main drawback is application guidance: the product data gives no mixing ratio, so buyers may need to check the label before measuring or applying it. I’d choose it for established lawns and gardens where the larger container suits the job, not for anyone seeking a fully specified application plan.
Pros:- Gallon-size liquid supply suits larger lawn and garden jobs
- Designed to help loosen compacted clay
- Supports root strength and water and nutrient retention
- Can be incorporated alongside regular lawn care
Cons:- Product data does not provide a mixing ratio
- A soil conditioner, not a complete fertilizer
- Does not list a humic acid concentration
Best for: Homeowners treating established lawns or gardens with compacted clay who want a gallon-size liquid conditioner to use alongside routine care.
Not ideal for: New users who need a clearly stated dilution rate in the product data, or buyers looking for a standalone fertilizer with listed nutrient percentages.
- Brand:Bloom City
- Form:Liquid
- Volume:128 fluid ounces (1 gallon)
- Weight:8 pounds
- Intended use:Lawns and gardens
- Made in:USA
- Part number:BHUMIC1G
Our verdict“Choose this gallon-size conditioner for broad lawn or garden use if you can confirm the application rate from the label before mixing.”
Humic Acid Fertilizer and Soil Conditioner, 10 lb
This 10-pound scatter-applied granule suits gardeners who prefer a dry amendment over mixing liquids or preparing a soluble powder. Its small screened particles are described as supporting nutrient uptake, microbial activity, water retention, root health, and seed germination. Compared with Down To Earth Organic Granular Humic Acids, it offers twice the listed package weight, while Down To Earth provides a stated 50% humic acid content and OMRI listing—details that make its composition easier to evaluate. The tradeoff here is limited application guidance: the supplied data lists a 1:1 mixing ratio without explaining what it refers to, even though the application method is scatter. I’d favor this for garden buyers who want a straightforward granular format and can follow the package directions, rather than those who need a clearly quantified concentration.
Pros:- 10-pound package offers more material than the 5-pound Down To Earth option
- Granular form avoids mixing a liquid solution
- Small screened particles are intended for garden use
- Described as supporting nutrient uptake, microbial activity, and water retention
Cons:- The listed 1:1 ratio lacks instructions or context in the product data
- No humic acid concentration is specified
- Application guidance should be checked before spreading
Best for: Gardeners who want a larger bag of scatter-applied humic granules for general plant and soil use.
Not ideal for: Organic growers who need an OMRI-listed product or buyers who require a clearly explained application rate and humic acid percentage.
- Brand:PowerGrow Systems
- Form:Granules
- Weight:10 pounds
- Pack count:1
- Application method:Scatter
- Listed mixing ratio:1:1
- Target species:Plants
Our verdict“Pick this for a larger granular garden amendment if package directions clarify the otherwise unexplained ratio.”
Wallace Organic Wonder DS-80 Soluble Humic and Fulvic Acid Powder, 1 lb
Wallace Organic Wonder is the most flexible pick here for buyers who want to prepare different kinds of applications from one product. The water-soluble powder has a listed minimum 93% humic and fulvic acid content and can be mixed for soil drenches, foliar sprays, fertigation, or seed treatment. That contrasts with Down To Earth Organic Granular Humic Acids, which is a ready-to-spread soil amendment with a stated 50% humic acid content but no listed foliar or fertigation use. Wallace also supplies a specific starting rate—0.5 teaspoons per gallon weekly—which gives buyers more direction than the Bloom City gallon liquid’s supplied product data. The tradeoff is hands-on preparation and repeated mixing. I’d choose it for growers who use several application methods, not anyone who wants a ready-to-use product.
Pros:- Water-soluble powder supports several application methods
- Lists a minimum 93% humic and fulvic acid content
- Provides a stated rate of 0.5 teaspoons per gallon
- Can be used alongside many liquid fertilizers and micronutrients
Cons:- Must be mixed before each application
- Suggested weekly use involves recurring preparation
- The product data does not specify the separate humic and fulvic proportions
Best for: Growers who need one concentrated humic and fulvic product for soil drenches, foliar feeding, fertigation, or seed treatment.
Not ideal for: Gardeners who prefer dry granules or ready-to-apply liquids and do not want to mix product regularly.
- Brand:Wallace Organic Wonder
- Form:Water-soluble powder
- Weight:1 pound (16 ounces)
- Humic and fulvic acid content:Minimum 93%
- Mixing rate:0.5 teaspoons per gallon of water
- Suggested frequency:Weekly
- Uses:Soil drench, foliar application, fertigation, and seed treatment
Our verdict“Choose Wallace for concentrated, multi-method use when you are comfortable measuring and mixing a weekly solution.”
Down To Earth Organic Granular Humic Acids, 5 lb
For gardeners who want a dry amendment with a disclosed composition and organic-production listing, Down To Earth makes the clearest case in this group. It contains 50% humic acids, comes in 1–3 mm granules, and is listed by OMRI for use in organic production. Those details set it apart from PowerGrow Systems’ 10-pound granules: PowerGrow offers a larger package, but its supplied data does not state a humic acid percentage or OMRI status. Down To Earth is intended for fields, turf, lawns, and vegetable gardens, so it suits more than small beds. Its tradeoff is that it remains a soil amendment, not a complete fertilizer, and the product description presents nutrient uptake and microbial support as potential benefits rather than guaranteed results. I’d pick it for organic-minded growers who value stated composition over package size.
Pros:- OMRI listed for use in organic production
- States a 50% total humic acid content
- Small 1–3 mm granules suit soil application
- Intended for fields, turf, lawns, and vegetable gardens
Cons:- Not a complete fertilizer
- Potential soil and nutrient benefits are not guaranteed
- Five-pound package is smaller than PowerGrow’s 10-pound option
Best for: Organic vegetable gardeners and turf or field growers seeking a granulated amendment with a stated humic acid percentage and OMRI listing.
Not ideal for: Buyers seeking a complete fertilizer, a liquid or foliar product, or a larger package than five pounds.
- Brand:Down To Earth All Natural Fertilizers
- Form:Granules
- Weight:5 pounds (80 ounces)
- Granule size:1–3 mm
- Total humic acids:50%
- OMRI listed:Yes, for use in organic production
- Target areas:Fields, turf, lawns, and vegetable gardens
Our verdict“Choose Down To Earth when organic-production listing and stated humic content matter more than package size or liquid versatility.”
Simple Lawn Solutions Soil Hume Seaweed and Humic Acid Concentrate, 32 fl oz
This concentrate stands apart by pairing 4.5% humic acid with 4% Ascophyllum nodosum seaweed, so it makes the most sense for buyers who want a blended supplement to apply alongside an existing fertilizer program. Its 1:100 mixing ratio and spray-compatible format give it a more defined application path than the Bloom City gallon product, whose supplied data omits a dilution rate. The tradeoff is volume: at 32 fluid ounces, it is a smaller container than Bloom City’s one-gallon liquid conditioner. It also is not a standalone fertilizer, so buyers still need a separate nutrient source. The product can be applied to lawns, gardens, and indoor plants using a sprayer or watering can, giving it broader setting flexibility than a lawn-only treatment. I’d choose it for routine, diluted applications where the seaweed blend is a priority.
Pros:- Combines 4.5% humic acid with 4% seaweed
- Lists a 1:100 mixing ratio
- Can be applied by sprayer or watering can
- Suitable for lawns, gardens, and indoor plants
Cons:- Designed to supplement rather than replace a fertilizer program
- 32-fluid-ounce container is smaller than Bloom City’s gallon option
- Includes seaweed, which may not suit buyers seeking humic acid alone
Best for: Gardeners and lawn owners who already use fertilizer and want a diluted humic-and-seaweed supplement for lawns, beds, or indoor plants.
Not ideal for: Buyers seeking a complete fertilizer, a humic-only product, or a larger liquid container for broad-area treatment.
- Brand:Simple Lawn Solutions
- Form:Liquid
- Volume:32 fluid ounces
- Seaweed content:4% Ascophyllum nodosum
- Humic acid content:4.5%, derived from leonardite
- Mixing ratio:1:100
- Application method:Spray or watering can
- Country of manufacture:United States
Our verdict“Choose Soil Hume if you want a clearly diluted humic-and-seaweed supplement for use alongside your regular fertilizer.”
How We Picked
I compared the 15 options by the factors that change how a buyer can use them: product form, stated ingredients, package size, intended application setting, and whether the formula combines humic substances with other inputs. I gave more weight to products whose format and intended use are clear, since a liquid concentrate, soluble powder, and granular amendment call for different equipment and routines.
The ranking favors versatility and clarity for the broadest range of soil-amendment buyers, then gives specialized products credit when they suit a defined job such as large lawn coverage, small-scale trial use, or combined nutrient application. Product names and supplied details do not establish application rates, humic concentration, or performance in a particular soil, so I do not infer those claims. Buyers should confirm label directions and ingredient details before choosing.
| humic acid fertilizer | Form |
|---|---|
| FoliarTech Organic Humic Acid | Liquid |
| Simple Lawn Solutions 15-0-15 | Liquid |
| GS Plant Foods Liquid Humic Ac | Liquid |
| Farmer’s Secret Organic Soil R | Liquid |
| PowerGrow Systems Humic Acid F | Powder |
| GS Plant Foods Humic Acid Soil | Liquid concentrate |
| Bloom City Humic Acid Liquid S | Liquid |
| The Andersons Humic DG Organic | Granules |
| Bloom City Humic Acid Liquid S | Liquid |
| Farm Made Organics Humic+ Liqu | Liquid |
| Bloom City Humic Acid Liquid S | Liquid |
| Humic Acid Fertilizer and Soil | Granules |
| Wallace Organic Wonder DS-80 S | Water-soluble powder |
| Down To Earth Organic Granular | Granules |
| Simple Lawn Solutions Soil Hum | Liquid |
Factors to Consider When Choosing Best Humic Acid Fertilizers
Humic products vary in more than package size. I would start by identifying the job, then check how the product fits your equipment, soil plan, and other inputs.
Choose the form that fits your application routine
Liquid products suit buyers who already use a sprayer, watering can, or compatible application system, but the label must specify dilution and application directions. Concentrated liquids require measuring and mixing; a ready-to-use format, if offered, would remove that step, but do not assume a product is ready to apply from its name alone. Soluble powders can reduce storage bulk, though they add mixing and dissolution steps. Granules may suit broad lawn applications when you have a spreader and the label supports that use. A common mistake is buying by ingredient name alone, then discovering the form does not match your tools or routine.
Match the product to the job, not just the crop
A lawn, a row of garden beds, and container plants can call for different application methods and amounts, even when the same ingredient appears on the label. Check whether the maker names your intended setting and follow the directions for that use rather than adapting a lawn rate to pots or garden soil. Products combining humic substances with nutrients or seaweed may be useful when those additions fit your plan, but they can complicate a program that already includes fertilizer. If your goal is simply to add a humic amendment, compare the full ingredient list and avoid paying for bundled inputs you do not need. The best fit is the one that matches both the target area and your existing feeding schedule.
Compare concentration and coverage before package size
A larger bottle or bag does not automatically treat more area: application rate and concentration determine how long a package lasts. Check the label for dilution, area coverage, and repeat-application guidance before comparing formats. When those details are unavailable, avoid assuming that gallon, pound, or ounce sizes are directly comparable across brands. Smaller packs can be sensible for first-time buyers or limited garden areas, while large containers make more sense when a label-supported treatment plan calls for repeated use. This comparison is especially relevant here because the lineup spans small trial-size liquids, gallon packages, and a 40-pound granular product.
Read the ingredient source and blend details
Product labels may identify a source such as leonardite or combine humic acid with fulvic acid, seaweed, or fertilizer nutrients. Those descriptions help distinguish formulations, but they do not by themselves prove that one product will work better in every soil. Look for a clear ingredient statement and the information needed to apply the product safely and correctly. If you want a straightforward amendment, choose a formula whose added ingredients serve a purpose in your plan. If you prefer a blend, account for those ingredients when deciding what else to apply.
Check compatibility, storage, and application effort
Before mixing a humic product with fertilizer or another soil input, check both labels for compatibility and application instructions. Some products need agitation or careful dilution, while dry formats require suitable spreading or dissolving equipment. Storage also matters: a bulky bag may be awkward in a small shed, while multiple liquid containers can take space and need secure storage. Avoid mixing several products into one tank based only on convenience, since labels may call for separate applications. Choosing a format you can store and apply as directed is more useful than buying a package that looks efficient on paper.
Set expectations for what a humic amendment can do
Humic products are soil amendments, not a substitute for diagnosing every plant or lawn problem. Poor growth can also relate to drainage, pH, nutrient availability, watering, pests, or other conditions, and a humic product cannot correct all of them. A soil test and the product label can help distinguish an amendment choice from a nutrient deficiency that needs a different response. Be wary of choosing based on broad promises rather than the stated formulation and directions. For a fair comparison, follow the label and avoid changing several inputs at once.
Frequently Asked Questions
Should I choose a liquid, powder, or granular humic acid product?
Choose based on your application equipment and the area you need to treat. Liquids fit buyers who can measure and apply a concentrate, while soluble powders add a mixing step and granules call for suitable spreading equipment. The Andersons Humic DG is the lineup’s clearest large-area granular choice; Wallace Organic Wonder DS-80 is the soluble powder option. Check label directions and coverage before deciding, since package weight or volume alone does not show how much area a product treats.
Can I use humic acid fertilizer on both a lawn and a garden?
Some products are presented for lawns and gardens, but that does not mean every product or application rate is suitable for both. Follow the label for the specific crop or area, particularly for dilution, timing, and application method. A lawn-focused formula may be inconvenient for containers or small beds, while a small liquid bottle may be impractical for a large lawn. If the product combines nutrients or seaweed with humic substances, account for those ingredients in your garden or lawn plan.
Is a humic product with added fertilizer or seaweed a better choice?
It is a better fit only when the added ingredients match what your plants need and do not duplicate other products in your routine. Simple Lawn Solutions 15-0-15 is a nutrient-bearing lawn fertilizer, while Simple Lawn Solutions Soil Hume combines seaweed and humic acid. A humic-only amendment may be easier to fit into a program where fertilizer is already applied separately. Check the full label and your soil or lawn needs before choosing a blend for convenience.
How do I compare two products when their package sizes are different?
Compare application rate, dilution, and stated coverage rather than comparing ounces, gallons, or pounds alone. A concentrated liquid may treat a different area per unit of product than a less concentrated formula, and dry products have their own application rates. If the label does not provide clear directions or coverage, treat that as missing information instead of guessing. The lineup’s range—from small Bloom City bottles to a 40-pound granular option—makes label-based comparison especially important.
Can I combine a humic acid product with my regular fertilizer?
Do not assume products can be mixed in the same tank or applied together just because one is described as a soil amendment. Read both labels for mixing compatibility, timing, and application guidance, and contact the manufacturer if directions are unclear. A product that already contains fertilizer nutrients may duplicate part of your normal feeding program. Separate applications can be a safer choice when compatibility is not confirmed, provided each product’s directions allow it.
Conclusion
For the broadest mix of liquid convenience and soil-amendment focus, I would start with GS Plant Foods Liquid Humic Acid Soil Amendment, Leonardite-Derived as the best overall pick. For best value, compare the GS Plant Foods 32-ounce concentrate with the larger package sizes using the label’s dilution and coverage details rather than bottle volume alone. The best premium choice for broad dry application is The Andersons Humic DG, provided you have the equipment and area to make a granular product practical. Beginners who want a smaller commitment can look at Bloom City’s 8-ounce format, while buyers seeking humic and fulvic acids in a soluble powder should consider Wallace Organic Wonder DS-80. For a lawn plan that also calls for nutrients or seaweed, compare the Simple Lawn Solutions blends—but choose a humic-focused product instead if those additions would overlap with your existing routine.
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