Best Organic Lawn Fertilizers

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A lush green lawn is a bliss to sink bare feet into and to envy the neighbors. Choosing the right lawn food starts with understanding the soil, its nutrient profile, and using an organic lawn fertilizer. Natural lawn fertilizers keep your lawn eco-friendly. Unlike synthetic chemical fertilizers, they won’t pose any threat to your pets or family.

Key Specs Compared

Numbers match the reviews below (tap to jump).

Key specs of the 5 products reviewed below

#	Size	Stated certifications
1	100 Count	–Not stated
2	2 Ounce	–Not stated
3	50 Count	USDA Organic, OMRI Listed
4	15 lb.	OMRI Listed
5	30 pounds	OMRI Listed

– = not stated by the maker · Specs and certifications as stated by the listing, not tested or verified by us; check the listing before you buy

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Potential Hazards of Chemical Fertilizers

Chemical fertilizers are affordable and assure instant improvements in plant growth. However, the other side of the story says they are detrimental to soil, water, air, and of course, to living organisms, including you and us. Let’s go over some of the potential hazards of chemical fertilizers.

• They kill natural soil microbes, making the soil sterile where nothing can grow.
• When used in excess they cause chemical runoff. Over the years, it depletes the oxygen level in water bodies and affects aquatic flora and fauna.
• Soil acidification is another threat. Change in soil pH isn’t good for the greens.
• Overdoing nitrogen fillers causes chemical burns and reduces growth.
• Repeated applications may increase greenhouse gases in the atmosphere, which translates into land and ocean surface temperature changes.
• Soil mineral depletion also results from continuous use of chemical fertilizers.

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Organic Natural Fertilizers Are The Answer

Because what’s happening to the soil under your feet is critical. And, your lawn is no exception! Organic lawn fertilizers are made from plant, animal or mineral powders. Examples include compost and cottonseed meal. They act as soil conditioners to replenish soil nutrients. The result is better growth and strong roots. Here are some advantages of organic lawn fertilizers:

• Improve soil structure and water holding capacity
• Being slow-release fertilizers, they won’t over-fertilize the soil.
• Biodegradable, sustainable, and environmentally friendly

Also, consider some of our top organic air fresheners to experience a naturally refreshing and beneficial fragrance that is safe for babies and adults.

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Ingredients in a Good Organic Lawn Fertilizer

• Manure: they come from poultry, horse, cow or sheep. With lots of organic matter, they are best suited for increasing soil fertility and growth.
• Plant peels: Rich in nutrients including phosphorus and potassium, plant peels will help plant growth. Examples are banana and orange peels.
• Guano: It is rich in nitrogen, phosphorous, and microelements. Many organic fertilizer sprays have Guano in them.
• Bone meal: Fine ground bone is a potent calcium and phosphate source. They promote root strengthening and growth.
• Dried seaweed: Seaweed, an amazing source of trace minerals, helps soil fertility.
• Epsom salt: It is a great source of magnesium. Magnesium is essential for germination to photosynthesis.
• Greensand: It is an iron potassium silicate rich in iron, potassium, and numerous micronutrients.
• Blood meal: Rich source of nitrogen. But be careful not to overdo it as it burns the plant roots.

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What the Research Says

Green and eco claims should be specific and backed by evidence.^[3]

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How We Chose These Products

We don’t test products hands-on. We compared labels and listings: EPA registration where it applies, the ingredient list, scent or fragrance-free options, and price per use. We removed products that were out of stock, no longer listed or recalled, and we checked the brands we list against recent FDA ^[4] recall notices in October 2026. Brands don’t pay to be included, though we may earn a commission from purchases.

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Our Picks: Organic Lawn Fertilizers

If you’d like to pamper, your lawn, consider one of our top five recommended organic lawn fertilizers.

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1

• You get organic calcium tomato spikes with Cal-Mag from EarthPods, in a 100-count pack.
• Each capsule supplies calcium and magnesium for tomatoes, peppers, eggplant, cucumbers and squash grown in containers and raised beds.
• The capsules also contain plant nutrients, trace minerals and humates.
• Push the capsules into moist soil near the roots and water: two to four for a tomato or pepper in a pot or grow bag, more for large raised-bed plants.
• One capsule feeds the roots for 14 to 21 days, so repeat every two to three weeks; 100 capsules give up to 100 feedings.
• Use it alone or alongside your regular vegetable fertilizer. It is a supplement for garden vegetables, not a lawn feed.
• Made in the USA. It measures 2.2 x 2.2 x 3.2 inches and weighs 0.2 pounds.

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2

• This is a concentrated organic plant and tree additive from Humboldts Secret, in a 2 oz size.
• It is a 0-0-2 liquid made with kelp, carbohydrates and minerals, so it goes with a base fertilizer and does not replace one.
• Mix 1 to 2 mL per gallon of water in vegetative growth and 2 to 5 mL per gallon in bloom; use half strength in recirculating hydroponic systems.
• The 2 oz size makes up to 55 gallons of feeding solution, so a small bottle goes a long way.
• It works with any growing method, including soil, coco, hydroponics and aeroponics.
• It suits vegetables, flowers, fruit, roses and trees. For a lawn it is only a supplement to a main fertilizer.
• It measures 1 x 1 x 2 inches and weighs 0.2 pounds.

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3

• Jobe’s Organics’ all-purpose organic fertilizer spikes for plants come in a 50-count pack.
• Certifications and seals include USDA Organic and OMRI-approved, and it contains no synthetic chemicals.
• It has an NPK analysis of 4-4-4, for vegetables, flowers, shrubs, trees and other plants.
• The spikes are pre-measured, so there is nothing to mix or weigh out, and no runoff, mess or smell.
• Apply them about every 8 weeks during the growing season, or as needed.
• The spikes go into the soil one at a time, so they suit beds, shrubs and trees rather than feeding a whole lawn.
• It measures 9 x 6 x 2.5 inches and weighs 0.7 pounds.

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4

• Wiggle Worm Pure Organic Worm Casting Fertilizer from Unco Industries comes in a 15 lb size.
• It is OMRI-approved and made of pure worm castings, not vermicompost or leftover worm bedding.
• The small, rounded particles add nutrients to the soil and help with aeration and drainage in loose and dense soils alike.
• Work a handful, or about half a cup, into the soil above the root zone, or into the planting hole at transplant or seeding; repeat about three times a year.
• It is odorless, so it can be used indoors on houseplants as well as outdoors on vegetables and garden beds.
• It is a soil conditioner more than a lawn fertilizer, so it suits beds, containers and houseplants; covering a whole lawn would take many bags.
• It measures 14 x 8 x 4 inches and weighs 15 pounds.

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5

• Sustane 8-0-4 fall lawn fertilizer comes in a 30 lb size.
• It has an NPK analysis of 8-0-4, so it contains no phosphorus.
• It is OMRI-approved and made from composted turkey litter, green waste compost, feather meal and sulfate of potash.
• Apply it in fall, after the last mowing and before the ground freezes, to feed the grass before winter and help it green up in spring.
• A 30 lb bag covers up to 5,000 sq ft at 6 lb per 1,000 sq ft; use 10 lb per 1,000 sq ft, which covers about 3,000 sq ft, if clippings are removed or the lawn gets heavy use.
• Spread it with a broadcast or drop spreader. It is the one pick here made specifically for lawns.
• Read the product label for directions and safety information before use.

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Index Table: Top Rated Organic Lawn Fertilizers

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Sources

1. U.S. EPA. Minimum Risk Pesticides (25(b)). Accessed October 16, 2026.
2. USDA Agricultural Marketing Service. Organic Labeling Standards. Accessed October 16, 2026.
3. Federal Trade Commission. Green Guides. Accessed October 16, 2026.
4. U.S. Food and Drug Administration. Recalls, Market Withdrawals, & Safety Alerts. Accessed October 16, 2026.

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Update History

• Oct 2026: Product picks reviewed and updated; added Sources (EPA, USDA AMS, FTC, FDA)
• Oct 2021: First published

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