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Earth Approved Soil Amendments

Compost & Organic Matter

  • Finished compost

  • Vermicompost (worm castings)

  • Black soldier fly frass (must be cured)

  • Leaf mold

  • Aged manure (herbivore sources)

  • Green manure

  • Compost tea

  • Aerated compost tea

These primarily add:

  • Organic matter

  • Beneficial microbes

  • Slow-release nutrients

Carbon-Rich Amendments

  • Biochar

  • Wood chips

  • Shredded leaves

  • Pine needles

  • Sawdust (untreated)

  • Bark fines

  • Straw

  • Hay (weed-free)

These help:

  • Build soil structure

  • Feed fungi

  • Increase water retention

Mineral Amendments

  • Rock dust

  • Basalt dust

  • Granite dust

  • Glacial rock dust

  • Azomite

  • Greensand

These supply:

  • Trace minerals

  • Long-term soil remineralization

Calcium Sources

  • Agricultural lime

  • Dolomitic lime

  • Gypsum

  • Crushed eggshells

  • Oyster shell flour

Used for:

  • Calcium deficiencies

  • Soil structure improvement

  • pH management

Nitrogen Sources

  • Alfalfa meal

  • Soybean meal

  • Clover cover crops

  • Legume residues

  • Composted poultry manure

Used to support:

  • Vegetative growth

  • Soil biology

Marine-Based Amendments

  • Kelp meal

  • Seaweed meal

  • Fish hydrolysate

  • Fish emulsion

  • Crustacean meal

Benefits:

  • Trace minerals

  • Plant growth stimulants

  • Microbial support

Cover Crops (Living Soil Amendments)

  • Clover

  • Sunn hemp

  • Cowpeas

  • Hairy vetch

  • Rye

  • Buckwheat

  • Daikon radish

Benefits:

  • Add organic matter

  • Fix nitrogen

  • Prevent erosion

  • Break up compaction

Biological Amendments

  • Worm castings

  • Mycorrhizal fungi

  • Beneficial bacteria inoculants

  • Indigenous microorganism cultures (IMO)

  • Compost extracts

These help:

  • Improve nutrient cycling

  • Build soil food webs

Local Resources

  • Arborist wood chips

  • Fallen leaves

  • Grass clippings

  • Garden trimmings

  • Coffee grounds

  • Spent brewery grains

  • Composting Facilities

  • Landscaping Facilities

  • Garden Centers

  • Local Farmers

Grow Earth Care Philosophy

Step 1: Protect the Soil with mulch & cover crops

Step 2: Feed the Soil with compost & other organic matter

Step 3: Mineralize the Soil with rock dusts & calcium sources

Step 4: Build Soil Biology with worm castings, compost teas & mycorrhizae

Step 5: Keep Living Roots in the Ground with Cover crops, food forests & diverse native plantings

Healthy soil isn't created by a single product—it's built by supporting the physical, chemical, and biological systems that make soil alive.

Click here to get the full article on soil amendments.

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