Wollastonite Calcium Silicate
Vanderbilt Minerals VANSIL W-10 Wollastonite
Natural Calcium Silicate Fertilizer, OMRI Organic Approved
Use as an alternative to limestone and to provide Plant Available Silicon and Calcium in your soilless potting mixes.
Wollastonite, a natural calcium silicate mineral, is unique among soil amendments as a source of silicon and carbon-neutral calcium. VANSIL wollastonite is sourced from a Vanderbilt Minerals deposit and processing facility in northern New York state. It is the only OMRI certified wollastonite mined and milled in the United States. It is not a slag by product.
