{"product_id":"gypsum-calcium-sulfate","title":"Gypsum (Calcium Sulfate)","description":"\u003cp\u003eGreenway Biotech Gypsum is finely ground, mined calcium sulfate dihydrate (97% CaSO₄·2H₂O) with a guaranteed analysis of 22.5% calcium and 18% sulfur. Both nutrients arrive in the forms roots absorb, and because calcium sulfate is a neutral salt, soil pH stays where it is. That makes gypsum the right calcium choice when a soil test shows low calcium at a pH that lime would push too high, and the right sulfur choice when elemental sulfur would acidify.\u003c\/p\u003e\n\u003cp\u003eGypsum is also used to reclaim sodium-affected (sodic) soil: its calcium displaces sodium from the clay so irrigation can leach it below the root zone. Garden calcium starts at 1 lb per 100 sq ft, worked in before planting; the label's sodic-soil rate is 100–200 lb per 1,000 sq ft, applied only after a soil test confirms sodium and where the soil drains.\u003c\/p\u003e\n\u003cp\u003eIt will not loosen ordinary compacted clay, does not change pH, and is too slow-dissolving for foliar, drip, or hydroponic use. Fine powder, packaged in Madera, California, in seven sizes from 1 to 50 lb.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":67664833642632,"sku":"018227120319","price":19.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":67664833675400,"sku":"018227120326","price":22.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":67664833708168,"sku":"018227120333","price":26.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67664833740936,"sku":"018227120340","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67664833773704,"sku":"018227120357","price":45.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67664833806472,"sku":"018227120364","price":79.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":67664833839240,"sku":"018227120371","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/4648\/6408\/files\/Gypsum.jpg?v=1791900228","url":"https:\/\/www.natesgardensupply.com\/products\/gypsum-calcium-sulfate","provider":"Nate's Garden Supply","version":"1.0","type":"link"}