Espoma Organic Greenrock Basalt Mineral Soil Supplement

Espoma Organic Greenrock is an all-natural mineral soil supplement made from 100% pure basalt. This non-burning, organic alternative to greensand helps enrich garden soil with a natural source of iron, magnesium, calcium, and trace minerals to support healthier plants, deeper green foliage, and improved overall vigor.

Ideal for vegetables, flowers, trees, shrubs, houseplants, raised beds, containers, and landscape plantings, Espoma Greenrock helps build stronger soil while gently nourishing plants over time. Its earth-based mineral profile makes it a dependable choice for gardeners looking to improve plant color, support nutrient availability, and encourage long-term soil health without synthetic additives.

Key Benefits

Promotes Deep Green Foliage
Provides 4% iron to help support rich green leaf color and reduce yellowing caused by iron deficiency.

Adds Essential Minerals
Supplies a natural blend of iron, magnesium, calcium, and trace minerals to help improve plant health and soil quality.

Organic Alternative to Greensand
Made from 100% pure basalt, Greenrock is a mineral-based soil amendment that can be used as a natural alternative to traditional greensand.

Supports Plant Vigor & Growth
Helps nourish flowers, vegetables, houseplants, trees, and shrubs for stronger, healthier growth.

Non-Burning & Easy to Use
A gentle, natural amendment that can be mixed into soil or applied around established plants.

Safe for People, Pets & the Planet
Made from natural ingredients and safe to use around families, pets, and garden spaces when applied as directed.

How to Use Espoma Organic Greenrock

New Garden Beds:
Mix 5–10 lbs per 100 square feet into the top 4 inches of soil before planting.

Trees & Shrubs:
Apply 1 cup per foot of drip line diameter, or 1 cup per inch of trunk diameter, and water thoroughly.

Potted Plants:
Mix 1/2 cup into each cubic foot of soil when planting.

Established Potted Plants:
Apply 1 teaspoon for every 3 inches of pot diameter once per month, gently work into the soil surface, and water well.

For best results, mix into soil where roots can access the minerals and water thoroughly after application. Always follow the product label for plant-specific recommendations.