Best Organic Lawn Fertilizers In May 2025

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Here, we’ll review the top 10 Best Organic Lawn Fertilizers on the market today. We’ll provide an overview of the pros and cons of each product. Read on for our selection of Best Organic Lawn Fertilizers.

To help you in your search, we have completed this list of the Best Organic Lawn Fertilizers.

Top Rated Best Organic Lawn Fertilizers Of 2025

Rank	Product Name	Score
1	Maximum Green & Growth- High Nitrogen 28-0-0 NPK- Lawn Food Natural Liquid Fertilizer Buy Now	9.7 Buy Now
2	Liquid Kelp Organic Seaweed Extract 1 Gallon Fertilizer Concentrate Buy Now	9.5 Buy Now
3	Superior Nitrogen & Potash 15-0-15 NPK- Lawn Food Natural Liquid Fertilizer - Concentrated Buy Now	9.1 Buy Now
4	Purely Organic Lawn Food Buy Now	8.8 Buy Now
5	Pet Safe Lawn Fertilizer 5M, Treats 5,000 square ft. Pet and Kid safe Buy Now	8.6 Buy Now
6	Milorganite 32 lb. Slow-Release Nitrogen Fertilizer Buy Now	8.3 Buy Now
7	Safer Brand 9334 Lawn Restore Fertilizer – 25 lb,White Buy Now	8.1 Buy Now
8	Just Scentsational TP-2.5G Trident's Pride Organic Liquid Fish Hydroponic Soil Fertilizer, 320 oz Buy Now	7.8 Buy Now
9	Espoma EOSR30 Organic Summer Fertilizer, 30-Pound Buy Now	7.5 Buy Now
10	Espoma ELF20 20-Pound Organic All Season Lawn Food Buy Now	7.2 Buy Now

1. Maximum Green & Growth- High Nitrogen 28-0-0 NPK- Lawn Food Natural Liquid Fertilizer

• Just like the human body your lawn needs essential vitamins and nutrients to survive and maintain health. read in description sign of symptoms of nitrogen deficiency.
• All grass types: including bermuda, st. augustine, zoysia, buffalo, centipede, florida palmetto, bahia, fescue, ryegrass & kentucky bluegrass
• The power of quick release and slow release nitrogen: 70% quick release nitrogen to stimulate quick green and growth while 30% slow release nitrogen keeps your lawn feed in between applications.
• 28-0-0 liquid lawn food nutritional supplement: high nitrogen formula. use to stimulate green & growth or to treat nutrient deficiency.
• Contains high quality feed grade compounds: nourish your lawn to health with liquid nutrients. designed to be quickly & easily applied.

2. Liquid Kelp Organic Seaweed Extract 1 Gallon Fertilizer Concentrate

• Compliant for use in an organic system, and verified by omri listings (https://www.omri.org/)
• Made from the finest seaweed plant ascophyllum nodosum
• Improves seed germination and increases root development. increases bloom set and size of flowers and fruit.
• One of nature's 'miracle' plant foods!
• Relieves stress in plants caused by extreme weather conditions.

3. Superior Nitrogen & Potash 15-0-15 NPK- Lawn Food Natural Liquid Fertilizer - Concentrated

• The power of nitrogen & potassium blended with humic acid: intensify green and growth while providing key nutrients for health and strength. humic/fulvic acid conditions soil while helping the transfer of food throughout the plant cell.
• Made with high quality feed grade ingredients: nourish your lawn to health with safe, pure liquid nutrients. designed to be quickly & easily applied.
• 15-0-15 phosphorus-free liquid lawn food nutritional supplement: if you want to maintain lawn health or if your lawn symptoms of a nitrogen & potassium deficiency then this is the correct fertilizer for you!
• Produced in the united states: 15-0-15 is manufactured in the united states of america, by a family owned business with 25 years of former experience in the commercial professional turf industry.
• All grass types: including bermuda, st. augustine, zoysia, buffalo, centipede, palmetto & bluegrass. safe for children and pets.

4. Purely Organic Lawn Food

• Covers up to 5,000 square feet. feeds all season long.
• Plant based formula with distillers grains & soy. no harsh chemicals, no manure & no smelly biosolids.
• Promotes lush green turf grass. will not burn your lawn.
• 10-0-2 formula with no phosphorus meets town & municipality regulations restricting phosphate use.
• Convenient, family & pet friendly. no restrictions on re-entry time after application.

5. Pet Safe Lawn Fertilizer 5M, Treats 5,000 square ft. Pet and Kid safe

• Safe for humans, domestic animals and all wildlife
• Simply apply, water and play!
• 24-0-6
• Builds a thick green lawn

6. Milorganite 32 lb. Slow-Release Nitrogen Fertilizer

7. Safer Brand 9334 Lawn Restore Fertilizer – 25 lb,White

• Revitalizes lawn to a thick turf by strengthening root systems
• Lawns will green up within 3 to 5 days
• Covers up to 6,250 sq ft
• Promotes a robust root system for a healthier lawn
• Provides effective year-round care by helping plants withstand heat, cold and drought stresses

8. Just Scentsational TP-2.5G Trident's Pride Organic Liquid Fish Hydroponic Soil Fertilizer, 320 oz

• Increased microbe production reduces the need for pesticides and creates stronger growth
• Trident's pride cuts down on chemical fertilizers while increasing anti-oxidants, sugar, and earthworm population
• Omri-rated, all-natural, cold pressed, 100% organic fish fertilizer adds proteins and enzymes to soil
• Concentrated, high-energy soil nutrient broth creates better lawns, crops, or gardens
• This fertilizer comes in an easy-pour jug with a handle for easy application, suggested use is 4-6 oz per gallon of water

9. Espoma EOSR30 Organic Summer Fertilizer, 30-Pound

• Feeds up to 5,000 sq ft
• Contains bio-tone microbes and 2-percent non-staining iron
• Feeds up to 5,000 sq ft
• Made from feather meal poultry manure iron oxide and elemental sulfur
• 8-0-1 formulation 30 lbs
• Contains bio-tone microbes and 2-percent non-staining iron

10. Espoma ELF20 20-Pound Organic All Season Lawn Food

• Safe to use
• Rapid greening plus long term feeding
• 18-0-3 formula
• Two to four times the coverage of natural lawn foods
• All season lawn food