{"product_id":"b0949tqn76","title":"Redrock 4 inch Rockwool Cubes – 4\" x 4\" Stone Wool Starter Blocks with 42\/40 Hole | 6-Pack | for Hydroponics \u0026 Indoor Growing | Includes Twin Canaries Chart","description":"\u003cdiv\u003e\n\u003ch1\u003eAbout This\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eRockwool Cube for Hydroponics \u0026amp; Propagation – This 4” x 4” stone wool cube is engineered for early-stage growth and propagation in hydroponic systems, perfect for leafy greens, herbs, and fruiting crops.\u003c\/li\u003e\n\u003cli\u003ePre-Formed 42\/40 Planting Hole – Each block includes a standard 42\/40 mm hole designed for clean and easy transplanting of starter plugs or cuttings.\u003c\/li\u003e\n\u003cli\u003eInert Stone Wool Composition – Manufactured from dense, U.S.-sourced rock wool for a sterile, soil-free environment that supports consistent moisture and air balance.\u003c\/li\u003e\n\u003cli\u003eEfficient Moisture Retention – These rock wool planting cubes retain water evenly while allowing proper dry-back and air exchange, helping maintain healthy root zone conditions.\u003c\/li\u003e\n\u003cli\u003eCompatible with All Major Systems – Ideal for use in ebb \u0026amp; flow, drip irrigation, and other hydroponic setups—trusted by greenhouse operators, indoor growers, and commercial cultivators.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eOverview\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial : Stone Wool\u003c\/li\u003e\n\u003cli\u003eColor : Red\u003c\/li\u003e\n\u003cli\u003eSpecial Feature : organic\u003c\/li\u003e\n\u003cli\u003eStyle : Rustic\u003c\/li\u003e\n\u003cli\u003ePlanter Form : Plant Pot\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Twin+Canaries+Liquid+Volume+Conversion+Chart","offers":[{"title":"Default Title","offer_id":47695615885486,"sku":"B0949TQN76","price":23.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/7509\/0862\/files\/71L0ldvRKSL._AC_SX679.jpg?v=1775094341","url":"https:\/\/seedvaultco.com\/products\/b0949tqn76","provider":"SeedVault Co.","version":"1.0","type":"link"}