{"title":"Wollastonite Calcium Silicate","description":"\u003ch2\u003eVanSil Wollastonite — Natural Calcium Silicate for Plants\u003c\/h2\u003e\u003cp\u003eVANSIL wollastonite is the \u003cstrong\u003eonly OMRI-certified wollastonite mined and milled entirely in the USA\u003c\/strong\u003e, sourced from Vanderbilt Minerals' deposit in Lewis County, New York. It is not a slag byproduct.\u003c\/p\u003e\u003cp\u003eUse it as a premium alternative to lime to deliver \u003cstrong\u003eplant-available silicon (Si) and carbon-neutral calcium (Ca)\u003c\/strong\u003e to your root zone. Available in multiple grades and sizes to suit home growers, commercial cultivators, and organic producers.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBioavailable silicon strengthens cell walls and improves stress and pest tolerance\u003c\/li\u003e\n\u003cli\u003eGentle pH correction without the spike risk of hydrated lime\u003c\/li\u003e\n\u003cli\u003eCarbon-neutral calcium — no heavy metals, no slag\u003c\/li\u003e\n\u003cli\u003eOMRI Listed for certified organic production\u003c\/li\u003e\n\u003cli\u003eMultiple grades: CS-1 (fine), W-20 (ultra-fine), WG (coarse)\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"vansil-cs-1-wollastonite-50-lb","title":"VanSil CS-1 Wollastonite Calcium Silicate 50 lb","description":"\u003ch2\u003eVanSil CS-1 Wollastonite — Natural Calcium Silicate for Plants\u003c\/h2\u003e\n\u003cp\u003eVanSil CS-1 is a fine-particle wollastonite mineral mined and milled in New York State — the \u003cstrong\u003eonly OMRI-certified wollastonite sourced and processed entirely in the USA\u003c\/strong\u003e. It is not a slag byproduct.\u003c\/p\u003e\n\u003cp\u003eUse it as a premium alternative to lime to deliver \u003cstrong\u003eplant-available silicon (Si) and carbon-neutral calcium (Ca)\u003c\/strong\u003e directly to your root zone. Ideal for soilless potting mixes, coco coir, and organic production systems.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBoosts plant cell wall strength and stress tolerance via bioavailable silicon\u003c\/li\u003e\n\u003cli\u003eRaises media pH gently without the spike risk of hydrated lime\u003c\/li\u003e\n\u003cli\u003eCarbon-neutral calcium source — no heavy metals, no slag\u003c\/li\u003e\n\u003cli\u003eOMRI Listed for use in certified organic production\u003c\/li\u003e\n\u003cli\u003eFine CS-1 particle size for effective nutrient release\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCaO: 45% | Ca: 34%\u003c\/li\u003e\n\u003cli\u003eSiO2: 50% | Total Si: 24% | Soluble Si: 3.6%\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"Vansil technical data sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/VANSIL-CS-1_TDS-7732351500372.pdf?v=1755685788\" target=\"_blank\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Vansil Safety data sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/VanSil-wollastonite-SDS-7732351500372.pdf?v=1755685573\" target=\"_blank\"\u003eSDS\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Vansil CS-1 OMRI certificate\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Vansil_CS-1_OMRI.pdf?v=1773749850\" target=\"_blank\"\u003eOMRI certificate\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/Bioavailable_Silicon__Release_Rate_from_Additives_Substrates.pdf?v=1774738168\" title=\"Bioavailable Silicon: Release Rate from Additives \u0026amp; Substrates\"\u003eBio-available silicon release rates\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout VanSil \/ Vanderbilt Minerals\u003c\/h3\u003e\n\u003cp\u003eVanderbilt Minerals has operated the only US wollastonite mine in Lewis County, New York for decades. VANSIL grades are trusted by professional growers, specialty crop cultivators, and organic farmers worldwide.\u003c\/p\u003e","brand":"Vanderbilt Minerals","offers":[{"title":"Default Title","offer_id":42225665146964,"sku":"VANSIL-CS-1-50lb.","price":27.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/vansil-cs-1-50lb-bag.jpg?v=1763977905"},{"product_id":"wollastonite-natural-calcium-silicate-fertilizer-4-lb","title":"VanSil Wollastonite Calcium Silicate 4 lb","description":"\u003ch2\u003eVanSil Wollastonite — Natural Calcium Silicate Fertilizer\u003c\/h2\u003e\u003cp\u003eVanSil wollastonite by Vanderbilt Minerals is the \u003cstrong\u003eonly OMRI-certified wollastonite mined and milled entirely in the USA\u003c\/strong\u003e — sourced from Lewis County, New York. Not a slag byproduct. The 4 lb size is ideal for home gardeners, container growers, and small greenhouse operations looking to incorporate silicon and calcium into their programs on a regular basis.\u003c\/p\u003e\u003cp\u003eUse as a gentle lime alternative to raise media pH while delivering \u003cstrong\u003eplant-available silicon (Si) and carbon-neutral calcium (Ca)\u003c\/strong\u003e to your root zone. Silicon strengthens cell walls, improves stress and pest tolerance, and enhances overall plant vigor without the pH spike risk of hydrated lime.\u003c\/p\u003e\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaO:\u003c\/strong\u003e 45% | \u003cstrong\u003eCa:\u003c\/strong\u003e 34%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSiO₂:\u003c\/strong\u003e 50% | \u003cstrong\u003eTotal Si:\u003c\/strong\u003e 24% | \u003cstrong\u003eSoluble Si:\u003c\/strong\u003e 3.6%\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant-available silicon\u003c\/strong\u003e — strengthens cell walls; improves stress and pest tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGentle pH correction\u003c\/strong\u003e — raises media pH without the spike risk of hydrated lime\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbon-neutral calcium\u003c\/strong\u003e — no heavy metals, no slag\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI Listed\u003c\/strong\u003e — certified for organic production under the NOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSA mined \u0026amp; milled\u003c\/strong\u003e — the only OMRI-certified wollastonite sourced entirely in the USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 lb bag\u003c\/strong\u003e — ideal for home gardens, container programs, and small greenhouse operations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eState restrictions:\u003c\/strong\u003e Not available for shipment to Oregon.\u003c\/p\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225665179732,"sku":"VANSIL-4lb-bag","price":7.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/image_ebb46d72-c837-488a-908f-9728c4429980.png?v=1775415699"},{"product_id":"wollastonite-natural-calcium-silicate-20-lb","title":"VanSil Wollastonite Calcium Silicate 20 lb","description":"\u003ch2\u003eVanSil Wollastonite — Natural Calcium Silicate Fertilizer\u003c\/h2\u003e\u003cp\u003eVanSil wollastonite by Vanderbilt Minerals is the \u003cstrong\u003eonly OMRI-certified wollastonite mined and milled entirely in the USA\u003c\/strong\u003e — sourced from Lewis County, New York. Not a slag byproduct. The 20 lb size is ideal for market gardeners, small farms, and greenhouse operations incorporating silicon and calcium into regular fertility programs.\u003c\/p\u003e\u003cp\u003eUse as a gentle lime alternative to raise media pH while delivering \u003cstrong\u003eplant-available silicon (Si) and carbon-neutral calcium (Ca)\u003c\/strong\u003e to your root zone. Silicon strengthens cell walls, improves stress and pest tolerance, and enhances overall plant vigor without the pH spike risk of hydrated lime.\u003c\/p\u003e\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaO:\u003c\/strong\u003e 45% | \u003cstrong\u003eCa:\u003c\/strong\u003e 34%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSiO₂:\u003c\/strong\u003e 50% | \u003cstrong\u003eTotal Si:\u003c\/strong\u003e 24% | \u003cstrong\u003eSoluble Si:\u003c\/strong\u003e 3.6%\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant-available silicon\u003c\/strong\u003e — strengthens cell walls; improves stress and pest tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGentle pH correction\u003c\/strong\u003e — raises media pH without the spike risk of hydrated lime\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbon-neutral calcium\u003c\/strong\u003e — no heavy metals, no slag\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMRI Listed\u003c\/strong\u003e — certified for organic production under the NOP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSA mined \u0026amp; milled\u003c\/strong\u003e — the only OMRI-certified wollastonite sourced entirely in the USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 lb box\u003c\/strong\u003e — ideal for market gardeners, small farms, and greenhouse programs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eState restrictions:\u003c\/strong\u003e Not available for shipment to Oregon.\u003c\/p\u003e","brand":"Vanderbilt Minerals","offers":[{"title":"Default Title","offer_id":42225665212500,"sku":"VANSIL-20lb-bag\/box","price":18.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/image_f8926224-ffd8-4208-9ca9-790a73d37855.png?v=1775416565"},{"product_id":"wollastonite-natural-calcium-silicate-1-lb","title":"VanSil Wollastonite Calcium Silicate 1 lb","description":"\u003ch2\u003eVanSil Wollastonite — Natural Calcium Silicate Fertilizer\u003c\/h2\u003e\u003cp\u003eThis 1 lb sample bag of VanSil wollastonite is the perfect way to trial the \u003cstrong\u003eonly OMRI-certified wollastonite mined and milled entirely in the USA\u003c\/strong\u003e. Sourced from Vanderbilt Minerals in Lewis County, New York — not a slag byproduct.\u003c\/p\u003e\u003cp\u003eUse as a gentle lime alternative to raise media pH while delivering \u003cstrong\u003eplant-available silicon (Si) and carbon-neutral calcium (Ca)\u003c\/strong\u003e to your root zone.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBioavailable silicon strengthens cell walls and improves stress and pest tolerance\u003c\/li\u003e\n\u003cli\u003eGentle pH correction without the spike risk of hydrated lime\u003c\/li\u003e\n\u003cli\u003eCarbon-neutral calcium — no heavy metals, no slag\u003c\/li\u003e\n\u003cli\u003eOMRI Listed for certified organic production\u003c\/li\u003e\n\u003cli\u003eGreat trial size for soilless mixes, coco coir, and container gardens\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGuaranteed Analysis\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCaO: 45% | Ca: 34%\u003c\/li\u003e\n\u003cli\u003eSiO2: 50% | Total Si: 24% | Soluble Si: 3.6%\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Custom Hydro","offers":[{"title":"Default Title","offer_id":42225665376340,"sku":"VANSIL-1lb-bag","price":5.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/5365\/5380\/files\/image_3b125387-3482-4864-8fe0-f5b509bac6e4.png?v=1775415334"}],"url":"https:\/\/customhydronutrients.com\/collections\/wollastonite-calcium-silicate.oembed","provider":"Custom Hydro","version":"1.0","type":"link"}