{"product_id":"essentials-plus-calmag","title":"Essentials PLUS CalMag – Cal Mag for Plants","description":"\u003ch2\u003eCalcium, Magnesium and Iron Where New Growth Needs Them\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eEssentials PLUS CalMag\u003c\/strong\u003e is a liquid \u003cstrong\u003ecalcium and magnesium supplement\u003c\/strong\u003e with added \u003cstrong\u003echelated iron\u003c\/strong\u003e and \u003cstrong\u003enitrate nitrogen\u003c\/strong\u003e (NPK \u003cstrong\u003e1.8-0-0\u003c\/strong\u003e). Calcium cannot move from old leaves to new ones, so plants need a steady supply in the feed; magnesium sits at the centre of chlorophyll; iron drives photosynthesis. Used at \u003cstrong\u003e1ml per litre\u003c\/strong\u003e alongside any base nutrient, it suits every system and growing medium, from coco and rockwool to soil and hydro.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects calcium and magnesium deficiency\u003c\/strong\u003e – rust spots, weak new growth and yellowing between the veins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStronger cell walls and root development\u003c\/strong\u003e from a constant calcium supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreener leaves\u003c\/strong\u003e – magnesium and iron support chlorophyll and photosynthesis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo forms of chelated iron\u003c\/strong\u003e (EDDHA and DTPA) that stay available across a wide pH range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with all main nutrients\u003c\/strong\u003e, in all systems and media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow dose\u003c\/strong\u003e – just \u003cstrong\u003e1ml per litre\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSoft Water, Coco and Hungry Plants\u003c\/h3\u003e\u003cp\u003eSoft tap water, reverse osmosis water and coco coir can all leave plants short of calcium and magnesium, and fast vegetative growth under strong light uses them up quickly. The first signs are brown spots, curling new leaves and pale patches between the veins. Adding CalMag to every feed keeps both elements topped up so growth stays healthy and even.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll systems and media:\u003c\/strong\u003e \u003cstrong\u003e1ml per litre\u003c\/strong\u003e alongside your main nutrients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhen to use:\u003c\/strong\u003e through prolonged vegetative growth, with soft or RO water, in coco, or whenever deficiency shows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e add to the water and stir before your base nutrients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC:\u003c\/strong\u003e CalMag raises EC, so check it after adding and adjust your base feed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH:\u003c\/strong\u003e check and adjust afterwards to \u003cstrong\u003e5.8–6.5\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv class=\"hcs-specs\"\u003e\u003cul\u003e\n\u003cli\u003eNPK: 1.8-0-0\u003c\/li\u003e\n\u003cli\u003eTotal nitrogen (N): 1.8% (nitrate nitrogen 1.8%)\u003c\/li\u003e\n\u003cli\u003eCalcium oxide (CaO): 4.0%\u003c\/li\u003e\n\u003cli\u003eMagnesium oxide (MgO): 1.7%\u003c\/li\u003e\n\u003cli\u003eIron (Fe) chelated by EDDHA: 0.04%\u003c\/li\u003e\n\u003cli\u003eIron (Fe) chelated by DTPA: 0.05%\u003c\/li\u003e\n\u003cli\u003eDose rate: 1ml per litre\u003c\/li\u003e\n\u003cli\u003eSuitable for: all systems and growing media\u003c\/li\u003e\n\u003cli\u003eRecommended pH: 5.8–6.5\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Essentials","offers":[{"title":"5L","offer_id":53803798659338,"sku":"NUT-ESS-005-01","price":35.9,"currency_code":"GBP","in_stock":false},{"title":"10L","offer_id":53803798692106,"sku":"NUT-ESS-005-02","price":65.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/essentials-plus-calmag-5l-1.jpg?v=1790229479","url":"https:\/\/hydrocropshop.co.uk\/products\/essentials-plus-calmag","provider":"Hydro Crop Shop","version":"1.0","type":"link"}