The Soil Sorcerer’s Greensand (Glauconite) Soil Amendment

The Soil Sorcerer’s Greensand (Glauconite)

Ancient Ocean Minerals for Soil Structure, Rooting, and Potassium Replenishment

Infused with the slow magic of the sea, The Soil Sorcerer’s Greensand (Glauconite) is a mineral-rich amendment mined from ancient marine sediment layers. This natural potassium and iron source is a time-tested favorite of organic growers and biodynamic soil builders alike—perfect for improving soil texture, water retention, and long-term fertility without risk of burning plants.

What is Greensand (Glauconite)?

Greensand is composed primarily of glauconite, a greenish mineral formed over millions of years in prehistoric seabeds. Rich in potassium (K) and iron, it’s revered for its ability to revitalize depleted soils while gently feeding plants and encouraging robust microbial life.

Unlike synthetic fertilizers, greensand releases nutrients slowly, making it ideal for long-term soil health, no-till gardening, and compost integration.

Key Benefits of Using Greensand:

Potassium (K₂O ~1-3%) – Strengthens plant structure, supports flowering, and improves fruit quality

Iron – Essential for chlorophyll formation and enzyme function

Micronutrients & Silicates – Help balance pH, improve nutrient uptake, and feed beneficial microbes

Enhances Soil Texture – Improves water retention in sandy soils and loosens clay-heavy soils

Safe & Gentle – Will not burn roots or foliage, even in heavy applications

Greensand is perfect for fruiting vegetables, perennials, herbs, flowers, and root crops.

How to Use Greensand:

Soil Amendment (Pre-Plant):

Mix 1–2 cups per 10 sq. ft. into the top 2–4 inches of soil

For depleted or compacted soils, use up to 5 cups per 10 sq. ft.

Established Plants (Top-Dress):

Apply ¼ to ½ cup around the base of each plant every 4–6 weeks

Gently work into the surface and water in

Compost Activation:

Add 1–2 cups per cubic foot of compost to boost mineral content and microbial action

Container Mixes:

Blend 1 tablespoon per gallon of soil for houseplants, pots, and raised beds

Product Details:

Guaranteed Analysis (approx.):
0-0-0.1 to 0-0-3 depending on source
Rich in iron, silica, and trace minerals

Derived From: Natural mined glauconite (marine-origin)

Texture: Fine granular

Color: Deep sea green

Breakdown Time: Long-acting, nutrient release over months to years

Available Sizes:

1 lb Bag – Great for potted plants, seedlings, or houseplants

5 lb Bag – Ideal for raised beds and garden rows

10 lb Bag – Perfect for whole garden plots or compost piles

15 lb Bag – Designed for farms, orchards, and large-scale growers