{"product_id":"redrock-starter-block-pro-4-x-4-x-2-5-case-of-216","title":"RedRock Starter Block PRO, 4\" x 4\" x 2.5\" (Case of 216)","description":"\u003cp\u003e\u003cstrong\u003eRedRock Starter Block PRO, 4\" x 4\" x 2.5\" (Case of 216)\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003e42\/40 Hole - 10x10x6.5cm - 4-Inch x 4-Inch x 2.5-Inch\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eCommercial grade stone wool pro starter blocks sourced and manufactured in North America.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOur Stone wool starter blocks are made in the USA and processed in Canada\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWetting agent ensures nutrients are immediately plant available\u003cbr\u003eThe high fiber density of the stone wool starter blocks makes better use of water and\u003c\/li\u003e\n\u003cli\u003efertilizers while allowing dry back\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOur stone wool starter blocks are priced for commercial agriculture production\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSizes available for any crop\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoisture\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eStone wool starter blocks have high moisture retention.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eNutrient Content\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eOnce treated, stone wool starter blocks will hold nutrient content.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOxygen Availability\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e97% when dry but rapidly hydrates. If allowed to drain the stone wool starter blocks allows for excellent oxygen to roots.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003epH and EC\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eStone wool has neutral pH, but can be controlled.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eREDROCK: Predictable Water Mobility\u003cbr\u003e\u003c\/strong\u003eRedRock Wool ensures uniform movement of water and nutrients throughout the plug, block, or slab. Our products will wet-up and dry back with predictability so growers can steer crops further than ever before. New tooling and technology blend horizontal and vertical fibers for the most homogenous and predictable water transport to date.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates channeling and dry zones.\u003c\/li\u003e\n\u003cli\u003ePredictable water movement and nutrient availability.\u003c\/li\u003e\n\u003cli\u003eWater moves horizontally then vertically for full saturation.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSELECT GROW MEDIA FOR COMMERCIAL USE\u003cbr\u003e\u003c\/strong\u003eIt is common to find propagators moving fresh cuttings into plugs for the initial stage of development. Once rooted plants are transplanted into stone wool grow blocks and then placed ontop of grow slabs to extend root zone development and access to water and nutrients. Selecting the correct substrate for your crop depends on many variables such as size, duration, density, and more,\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eREDROCK BLOCK’S USER GUIDE\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRedRock blocks are ultra-durable and made from premium material, but they should still be handled with care; Always keep mineral wool dry until use.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSaturate plugs by spraying with nutrient solution or submerging them for about one minute. Squeeze gently or let them drain for a few seconds before placing them onto slabs.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTransplant starter plugs into the blocks’ pre-drilled holes.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAs your fertigation system circulates nutrients and water to your plants, RedRock’s specialized wetting agent will deliver it evenly throughout your plants’ root zone.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"height: 156.734px; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px; width: 26.0148%; text-align: center;\"\u003e\u003cstrong\u003e PROPERTY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 57.1855%; height: 19.5938px; text-align: center;\"\u003e\u003cstrong\u003eDEFINITION \/ METHODOLOGY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 16.0618%; height: 19.5938px; text-align: center;\"\u003e\u003cstrong\u003eVALUE\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px; width: 26.0148%;\"\u003eDensity\u003c\/td\u003e\n\u003ctd style=\"width: 57.1855%; height: 19.5938px;\"\u003eMass per unit of volume\u003c\/td\u003e\n\u003ctd style=\"width: 16.0618%; height: 19.5938px;\"\u003e5 lb\/ft³\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.0148%;\"\u003eBond Strength\u003c\/td\u003e\n\u003ctd style=\"width: 57.1855%;\"\u003eBlocks are pressed with a metal rod until punctured to measure their resistance against punctures\/dents\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 16.0618%;\"\u003e200 lb\/ft2\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7656px;\"\u003e\n\u003ctd style=\"height: 58.7656px; width: 26.0148%;\"\u003eFree drainage\/water factor\/field capacity\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 57.1855%; height: 58.7656px;\"\u003ePlugs are fully saturated, then allowed to drain - how much water remains after ten minutes?\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 16.0618%; height: 58.7656px;\"\u003e90%\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"height: 58.7812px; width: 26.0148%;\"\u003eSink time\/hydration\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 57.1855%; height: 58.7812px;\"\u003ePlugs are placed dry onto the surface of water and the length of time before the block fully sinks shows how readily the block absorbs water\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 16.0618%; height: 58.7812px;\"\u003e15 seconds\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Monster Gardens","offers":[{"title":"Default Title","offer_id":45080167710856,"sku":"cp_md_043","price":123.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/4648\/6408\/files\/redrock_5.3_straight_1_2_1_1.jpg?v=1777327521","url":"https:\/\/www.natesgardensupply.com\/products\/redrock-starter-block-pro-4-x-4-x-2-5-case-of-216","provider":"Nate's Garden Supply","version":"1.0","type":"link"}