The Soil Makers
Calcium Montmorillonite Clay
Calcium Montmorillonite Clay
Couldn't load pickup availability
Calcium Montmorillonite Clay — a trace mineral colloidal silicate from The Soil Makers that nourishes living soil with nearly 50 mineral compounds.
The minerals are colloidal, meaning they are in a form ready for immediate utilization by the soil and all the life that thrives there. This calcium-rich clay supports soil life, improves mineral balance, and is OMRI-listed for use in organic production, making it a trusted choice for organic soil, living soil systems, organic potting soil, and water-only soil blends.
- Immediate mineral access for roots and microbes thanks to colloidal minerals.
- Soil-building power supports structure, moisture retention, and nutrient availability in organic soils and living soil mixes.
- OMRI-listed for organic production, suitable for organic soil, living organic soil, and organic potting mixes.
- Easy to apply as a soil conditioner in spring or fall at 300 lbs per acre.
Sizes and pricing: 10 lbs — $28 (free shipping); 50 lbs — $48 (plus shipping).
From The Soil Makers, with decades of soil science behind every bag, this clay conditioner helps you build a resilient soil food web for thriving gardens and healthy harvests.
Premium mineral clay conditioner for organic soils, boosting structure, moisture retention, and nutrient availability in living soils and potting mixes.
Calcium Montmorillonite Clay by The Soil Makers — OMRI-listed mineral clay conditioner for organic soils; improves structure, moisture retention, and nutrient availability.
Calcium Montmillornite is a trace mineral colloidal silicate which contains a combination of nearly 50 mineral compounds. The minerals are colloidal, which means they are in a form ready for immediate utilization by the soil and all the life that abounds in it. Conditioner can be applied to the soil spring or fall at a rate of 300 lbs. per acre. It is listed by OMRI for use in organic production.
10 lbs - $28 Free Shipping
50 lbs - $48 Plus Shipping
Shipping & Returns
Shipping & Returns
If an item arrives damaged or not as described, you can request a refund by contacting our customer service team within a specified time frame. We may ask you to provide photos or other evidence of the damage. Once we receive your request and confirm the issue, we will process the refund as soon as possible.
Our Guarantee
-
Shipping
We take great pride in our commitment to ship on time. Our team works diligently to ensure that every order is processed promptly and efficiently.
-
Refunds & Returns
If an item arrives damaged or not as described, you can request a refund by contacting our customer service team within a specified time frame.
-
Quality Guarantee
We ensure the quality of our products by using high-quality materials, and working with reputable suppliers.
