{"product_id":"stonewool-slabs-33x33x40mm","title":"Stonewool Slabs 33x33x40mm","description":"\u003cp\u003eStonewool (also known as rockwool) is a natural mineral growing medium, produced by spinning molten basalt rock into fine fibres and pressing it into blocks. Because it is manufactured under high heat, it starts out completely sterile and free of pests, weed seed and disease, so no additional sterilising is needed before use.\u003c\/p\u003e\u003cp\u003eGrowers value stonewool because it holds no soluble minerals of its own, which makes nutrient management straightforward, particularly when paired with a balanced hydroponic feed. It also strikes a good balance between water retention and air movement around the root zone, and tends to run warmer than a soil bed, which suits propagation and winter growing where consistent root zone temperature matters.\u003c\/p\u003e\u003cp\u003eThese 33x33x40mm slabs cut down into 45 individual cubes, a versatile mid size suited to general propagation across a wide range of herbs and vegetable seedlings. They work across NFT and flood and drain systems as well as traditional propagation trays, taking plants from first root through to a size ready for transplanting with minimal root disturbance.\u003c\/p\u003e\u003cp\u003eAvailable as a single slab, packs of two or four, or a full carton for larger propagation runs.\u003c\/p\u003e","brand":"Harford Greenhouses","offers":[{"title":"Single Slab","offer_id":53058090402103,"sku":"MIM0013-1","price":13.2,"currency_code":"NZD","in_stock":true},{"title":"Two Slabs","offer_id":53058090434871,"sku":"MIM0013-2","price":22.0,"currency_code":"NZD","in_stock":true},{"title":"Four Slabs","offer_id":53058090467639,"sku":"MIM0013-4","price":38.5,"currency_code":"NZD","in_stock":true},{"title":"Full Carton","offer_id":53058090500407,"sku":"MIM0013-CTN","price":418.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/7001\/0679\/files\/psedhgmfv.jpg?v=1790571041","url":"https:\/\/harfords.com\/products\/stonewool-slabs-33x33x40mm","provider":"Harford Greenhouses","version":"1.0","type":"link"}