Wollastonite Calcium Silicate

VanSil Wollastonite — Natural Calcium Silicate for Plants

VANSIL wollastonite is the only OMRI-certified wollastonite mined and milled entirely in the USA, sourced from Vanderbilt Minerals' deposit in Lewis County, New York. It is not a slag byproduct.

Use it as a premium alternative to lime to deliver plant-available silicon (Si) and carbon-neutral calcium (Ca) to your root zone. Available in multiple grades and sizes to suit home growers, commercial cultivators, and organic producers.

• Bioavailable silicon strengthens cell walls and improves stress and pest tolerance
• Gentle pH correction without the spike risk of hydrated lime
• Carbon-neutral calcium — no heavy metals, no slag
• OMRI Listed for certified organic production
• Multiple grades: CS-1 (fine), W-20 (ultra-fine), WG (coarse)