Best Soil Amendments

The Farmer’s Secret Soil Revitalizer earns its spot on our list thanks to feed the soil not the plants - stimulate microbial activity in your soil and boost probability of success with all types of plants… like composting but faster and for best results, apply monthly throughout the growing season. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $18.99, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Farmer’s Secret Soil Revitalizer earns its spot on our list thanks to feed the soil not the plants - stimulate microbial activity in your soil and boost probability of success with all types of plants… like composting but faster and for best results, apply monthly throughout the growing season. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $39.99, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Farmer’s Secret Soil Revitalizer (8oz) earns its spot on our list thanks to feed the soil not the plants - stimulate microbial activity in your soil and boost probability of success with all types of plants… like composting but faster and for best results, apply monthly throughout the growing season. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $8.99, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Back to the Roots Organic Worm Castings for Plants earns its spot on our list thanks to earth worm castings from mother earth provide the best soil amendment for anything indoors or outdoors, including vegetables, herbs, flowers and houseplants. pure usa vermicompost, so there's no burn or odor. and contains beneficial microbes to enhance your soil and protect seedlings from harmful pathogens.. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $17.20, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Back to The Roots Organic Coir earns its spot on our list thanks to includes 10lb block of back to the roots compressed coconut coir that expands to 51qt of potting soil. a balanced ph, which means it’s truly all-purpose. use alone or as an amendment for anything in a pot or in the ground - vegetables, flowers, herbs, and even starting seeds. and expands to over 2 cubic feet. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $16.99, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Organic Dolomite Lime 5LB earns its spot on our list thanks to omri listed - cz dolomite lime is an all-natural mineral fertilizer listed by the organic materials review institute (omri). it may be used in certified organic production or food processing and handling according to the usda national organic program regulations. (omri certified 2024) and supplies essential nutrients calcium and magnesium, and sweetens your soil to improve plant growth and maximize fertilizer performance. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $19.99, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The The Andersons HumiChar Organic Soil Amendment with Humic Acid and Biochar Covers 12 earns its spot on our list thanks to improves soil health, lawn health, plant health, and reduce the use of fertilizers and easy to apply spherical, uniform, low dust formulation. dispersible granule, or "dg" technology is the andersons' patented nutrient delivery system. with dg technology, particles are more rapidly and efficiently broken down. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $49.88, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Earth Science RevitaSoil earns its spot on our list thanks to premium soil revitalizer and boosts plant growth. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $23.95, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The Earth Science Fast Acting Gypsum Granules-5 lb- Soil Conditioner Adds Calcium earns its spot on our list thanks to loosen clay and support healthy plants. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $21.95, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.

The The Andersons HumiChar Organic Soil Amendment with Humic Acid and Biochar (40 lb) earns its spot on our list thanks to improves soil health, lawn health, plant health, and reduce the use of fertilizers and easy to apply spherical, uniform, low dust formulation. dispersible granule, or "dg" technology is the andersons' patented nutrient delivery system. with dg technology, particles are more rapidly and efficiently broken down. Our full review covers how it performs across multiple categories, and our testing team found it delivers consistent results that justify the investment.

Priced at $104.88, this model competes well against other soil amendments in its class. For alternatives, check out our picks for best overall and best value options.