{"product_id":"gypsum","title":"Gypsum","description":"\u003cp\u003eGypsum (Calcium Sulphate) is a high-purity, pH-neutral source of calcium and sulphur — essential for situations where you need to top up calcium without shifting your soil's pH. If anything, it carries a very mild acidifying quality, making it a smart choice for mid-season amendments, coco-based mixes, or any blend that isn't inherently acidic and doesn't need further alkalinity.\u003c\/p\u003e\n\u003cp\u003eProviding approximately 20% calcium and 16% sulphur, gypsum supports strong cell wall development and enzyme function across all growth stages. It's particularly well suited to acidic-soil-loving plants that still need adequate calcium supply — a combination that's hard to achieve with liming agents.\u003c\/p\u003e\n\u003cp\u003eWe stock white, graded gypsum with an approximate maximum particle size of 2–3 mm, with the majority being fine powder. Not all gypsum is equal — cheap sources are often recycled from gyprock particle board or pulled from low-quality mines where seam wall material ends up mixed with the extract. Both are inferior due to potential contamination and reduced purity.\u003c\/p\u003e","brand":"Soil Supply Co.","offers":[{"title":"500g","offer_id":48918022619376,"sku":"GYPSUM-500G","price":6.5,"currency_code":"AUD","in_stock":false},{"title":"1kg","offer_id":48918022652144,"sku":"GYPSUM-1KG","price":10.0,"currency_code":"AUD","in_stock":false},{"title":"2.5kg","offer_id":48918022684912,"sku":"GYPSUM-2.5KG","price":22.0,"currency_code":"AUD","in_stock":false},{"title":"5kg","offer_id":48918022717680,"sku":"GYPSUM-5KG","price":38.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1262\/6416\/files\/gypsum.png?v=1782530376","url":"https:\/\/soilsupply.co\/products\/gypsum","provider":"Soil Supply Co.","version":"1.0","type":"link"}