10 Best Organic Lawn Fertilizers of 2025

Tested and Reviewed: Top 10 Organic Lawn Fertilizers deals with expert ratings from 8.1 to a perfect 10

June 2025 Edition

Editor's Choice

9.7

Back to the Roots

Back to the Roots 100% Organic USA-Made Liquid Lawn Food 32oz Covers 2,000 sq ft Safe for Pets and All Lawn Types

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Editor's bottom line:

“This organic lawn fertilizers is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Effortless lawn care! Our ready-to-spray organic liquid lawn food nourishes all lawn types, covering 2,000 sq ft. Achieve a lush, vibrant lawn with ease.
Our unique blend with Soy Protein Hydrolysate a potent biostimulant, infused with a 1% IRON Formula, ensures a vibrant green. The balanced mix fosters lush growth, while iron enhances a deep, rich color for a stunning, healthy lawn.
Plus an exclusive mix of proven farm-grade elements for plants, soil, and microbes. The blend includes Fish Solubles, Sugar Molasses, Corn Steep Liquor, Soy Protein Hydrolysate, Sugar Beet Extract, Potash, and Kelp. And is safe for people and pets!
100% SATISFACTION GUARANTEE: If you are not satisfied or have any issues with this Organic LIquid Lawn Food, just shoot us a note and our dedicacted customer support team will make sure we get you growing or send you a refund/replacement.
#GROWONEGIVEONE Share a photo of your growing garden & well donate a Kids Grow Kit & STEM elementary school curriculum to a classroom of your choice!

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Picked by 322 people today

9.5

Purely Organic Products LLC

Purely Organic Products Lawn Food 10-0-2, 15 LB Bag (Covers 3,000 Square Feet)

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Main Highlights

Promotes Lush Green Turf Grass. Will Not Burn Your Lawn.
Plant Based Formula with Distillers Grains & Soy. No Harsh Chemicals, No Manure & No Smelly Biosolids.
Convenient, Family & Pet Friendly. No Restrictions on Re-Entry Time After Application.
10-0-2 Formula with No Phosphorus Meets Town & Municipality Regulations Restricting Phosphate Use.

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9.5

Organic Plant Magic

Organic Plant Magic - Truly Organic™ Slow Release Granular Lawn Fertilizer: Best Fertilizer for Grass, Bermuda, St. Augustine, Yard & Lawn Care - Grass Fertilizer Granules (20 Lb)

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Main Highlights

TRULY ORGANIC YOU CAN TRUST - OPM Lawn Food is Alive with GroBiotics: Amino & Humic Acids, Beneficial Biology and Complete Nutrition These are the ABCs of Organic Growing... With GroBiotics you will grow gorgeous grass better than ever before!
SAFE FOR KIDS, PETS & THE ENVIRONMENT - Made with the best non-toxic ingredients Whats not in Organic Plant Magic is just as important as what Is In It... With us youre doing the right thing. Like The Doctors Oath: We do no harm!
ALL PURPOSE - For all lawn maintenance, repair, recovery, seed starting and sod Installation For all regions, seasons and grasses... Grow thick green grass with ease the Truly Organic Way and get the spectacular lawn you really want!
EASY TO USE - Quick and simple to understand application chart Powerful, concentrated, compact, lightweight and convenient. Super premium, ultra fine, long lasting, slow release spreadable granules flow evenly through all spreaders Plus Fresh Scented!
NEVER BURNS - Inputs get to turf roots and begins working immediately Low application rates save time & money 20 pound bag treats up to 5,000 square feet of grass! You cant do this wrong, you can only do it better!
THE OPM PROMISE - Works For Everyone, Every Lawn, Everywhere, Every Time: Build strong healthy living soil that is resilient to problems Biologically increase the availability of air, water and nutrients, and the ability of your grass to use them This is the Truly Organic Way you can trust to grow a spectacular lawn with ease! EXTREME HAPPINESS GUARANTEED!

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Best Value

9.2

Save 6%

Down To Earth All Natural Fertilizers

Down to Earth Organic Bio-Turf Lawn Fertilizer Mix 8-3-5, 4 lb

6% OffFree Shipping

Main Highlights

Down to Earth Bio-Turf is a 4 pound box of fertilizer with 8-3-5 formula and is listed by the Organic Materials Review Institute (OMRI) for use in organic production
Entirely natural granular lawn fertilizer designed to encourage deep root development to help reduce watering requirements
Nitrogen-rich formula boosts early season growth while its extra Potassium reduces seasonal stress due to temperature change and drought
Ideal for heavy feeding garden vegetables like corn, tomatoes and leafy greens
Derived from: Hydrolyzed Feather Meal, Blood Meal, Meat Meal, Bone Meal and Langbeinite

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9.0

Save 6%

Milorganite

Milorganite Recycled Lawn and Garden Nitrogen Fertilizer (Recycled Organic Material)

6% Off

Main Highlights

Milorganites low-salt formula protects plants from dehydration and stress, ensuring safe use across various conditions, even during peak heat.
Safe for a variety of settings, from backyard lawns to edible gardens, Milorganite nourishes roots and supports strong, stable plant growth.
Enriched with naturally occurring iron, Milorganite helps your lawn achieve a lasting, vibrant green without the risk of staining walkways or concrete.
Each application provides consistent nutrition for up to 10 weeks, extending time between feedings and fostering healthier soil.
Milorganites even-release formula prevents patchy, uneven growth, making it easy to achieve a full, lush look.

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8.8

GS Plant Foods

Organic Kelp Fertilizer by GS Plant Foods - Omri Listed(1 Gallon) - Liquid Kelp Concentrate for Gardens, Lawns & Soil Yields 800+ gallons

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Main Highlights

OMRI ORGANIC LISTED SEAWEED & KELP FERTILIZER: Liquid Kelp is a natural plant food that provides a range of benefits for plant health and nutrition. OMRI listed for organic use, GS Plant Foods Liquid Seaweed Fertilizer is a completely natural, seaweed extract fertilizer for plants. Our liquid seaweed will optimize soil conditions for greater root mass and improve nutrient uptake. It can be applied without concern for harmful chemicals or nutrient loss to the environment.
ONE OF NATURES MIRACLE PLANT FOODS: Made from the finest seaweed plant Ascophyllum Nodosum, this is one of natures miracle plant foods. Our seaweed extract improves your plants tolerance to excessive heat, wind, drought conditions and more. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants.
IMPROVES OVERALL PLANT NUTRITION AT HOME OR COMMERCIALLY: GS Plant Foods sea kelp fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. Using GS Plant Foods seaweed plant fertilizer will lead to improved nutrient uptake and general plant wellbeing.
EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply liquid kelp to improve growing conditions in all growth stages. To use, simply mix 2 ounces of this liquid fertilizer concentrate organic into a gallon of water and apply. Each gallon of this mixture will then cover as much as 1,000 sq ft. Any sprayer will work, but for large areas, the hose end sprayer is easiest! This liquid kelp should be sprayed in the morning or late afternoon when temperatures are lower, and the leaves stoma are open.
TRUSTED & RELIABLE: At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality organic seaweed fertilizer products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you're growing or what medium in which your plants are growing.

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8.6

Espoma

Espoma Organic All Season Lawn Food 9-0-0 Natural & Organic Lawn Food; Fertilizer for All Lawns; Long Lasting Organic Nitrogen for a Greener Lawn. 28 lb. Bag Covers up to 5,000 Sq. Ft.

Main Highlights

CONTAINS: Espoma Organic Lawn Food is a rich blend of the finest natural & organic ingredients enhanced with our exclusive Bio-tone formula; 9-0-0 Fertilizer analysis. Adds Long Lasting Nitrogen for Deep Green Color. Environmentally Safe - No sludges or toxic ingredients.
FOR USE ON: Use for all lawns both cool and warm season grasses. Ideal for fescues, bluegrass, rye grass, St. Augustine and zoysia. Wont Burn Lawns or Leach Out of Soil
WHEN / HOW TO USE: Use both early & late spring and fall for all lawns. Apply with a drop or broadcast spreader.
FOR ORGANIC GARDENING: All Season Lawn Food is approved for organic gardening; It is a registered Organic Input Material meaning it meets all requirements for organic production.
MADE IN THE USA: Product of the Espoma Company. The leader in natural organics since 1929

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8.3

Espoma

Espoma Lawn Food for All Seasons;15-0-5 Analysis with Non-Staining Iron; Exclusive Bio-Tone Formula with Long Lasting Slow Release Nitrogen for a Greener Lawn. 40 lb. Bag Covers up to 12,000 Sq. Ft.

Main Highlights

15-0-5 formula

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Our Best Overall Choice

Best Choice

9.7

Back to the Roots

Back to the Roots 100% Organic USA-Made Liquid Lawn Food 32oz Covers 2,000 sq ft Safe for Pets and All Lawn Types

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Effortless lawn care! Our ready-to-spray organic liquid lawn food nourishes all lawn types, covering 2,000 sq ft. Achieve a lush, vibrant lawn with ease.
Our unique blend with Soy Protein Hydrolysate a potent biostimulant, infused with a 1% IRON Formula, ensures a vibrant green. The balanced mix fosters lush growth, while iron enhances a deep, rich color for a stunning, healthy lawn.
Plus an exclusive mix of proven farm-grade elements for plants, soil, and microbes. The blend includes Fish Solubles, Sugar Molasses, Corn Steep Liquor, Soy Protein Hydrolysate, Sugar Beet Extract, Potash, and Kelp. And is safe for people and pets!
100% SATISFACTION GUARANTEE: If you are not satisfied or have any issues with this Organic LIquid Lawn Food, just shoot us a note and our dedicacted customer support team will make sure we get you growing or send you a refund/replacement.
#GROWONEGIVEONE Share a photo of your growing garden & well donate a Kids Grow Kit & STEM elementary school curriculum to a classroom of your choice!

Show Price

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