{"product_id":"plagron-calmag-pro","title":"Plagron CalMag Pro – Calcium \u0026 Magnesium Supplement","description":"\u003cp\u003e\u003cstrong\u003eType: Mineral\u003c\/strong\u003e\u003cbr\u003eMineral feeds are dissolved minerals your plant can use straight away. They're fast-acting and precise, but it is possible to overdo them, so stick to the dose.\u003c\/p\u003e\n\u003ch3\u003eThe Most Overlooked Ingredient in Your Watering Can\u003c\/h3\u003e\n\u003cp\u003eHere's an odd truth: the \u003cem\u003epurer\u003c\/em\u003e your water, the hungrier your plants can get. Rainwater, filtered water, reverse osmosis (RO) water and soft tap water are wonderfully clean, and almost completely empty of calcium and magnesium. Plants notice. Rusty brown spots, yellowing between the leaf veins, weak or twisted new growth: plenty of \"mystery\" problems are simply a plant quietly asking for minerals its water never gave it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlagron CalMag Pro puts them back.\u003c\/strong\u003e It's a concentrated liquid calcium and magnesium supplement, blended in a balanced ratio so the two minerals don't compete with each other for uptake. One millilitre per litre turns empty water into the perfect base for whatever you feed next.\u003c\/p\u003e\n\u003ch3\u003eWhy It Works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStronger plants from the inside:\u003c\/strong\u003e calcium builds sturdy cell walls, helping stems carry heavier leaves, flowers and fruit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreener leaves:\u003c\/strong\u003e magnesium sits at the very heart of chlorophyll, keeping foliage deep green and photosynthesis humming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter roots, better uptake:\u003c\/strong\u003e supports root development and helps plants absorb the rest of their nutrients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTougher against stress:\u003c\/strong\u003e well-built cell walls stand up better to stress and disease.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade for LED lighting:\u003c\/strong\u003e plants under LEDs transpire less, so they naturally draw up less calcium. CalMag Pro closes the gap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA tiny dose goes a long way:\u003c\/strong\u003e at 1ml per litre, a single 500ml bottle treats up to 500 litres of water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor Houseplant Lovers\u003c\/h3\u003e\n\u003cp\u003eWatering with rainwater, a filter jug or softened tap water is a kind thing to do for fussy plants like \u003cstrong\u003eCalathea, Maranta, ferns and Alocasia\u003c\/strong\u003e, but it leaves their water mineral-free. The same goes for anyone growing under an LED grow light. Add CalMag Pro to your watering can at 1ml per litre and your plants get the calcium and magnesium they'd been missing, without you changing anything else.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOne exception:\u003c\/strong\u003e carnivorous plants such as Venus flytraps and Sarracenia need genuinely mineral-free water, so leave CalMag Pro out of their can.\u003c\/p\u003e\n\u003ch3\u003eFor Growers\u003c\/h3\u003e\n\u003cp\u003eCalMag Pro is a base supplement for \u003cstrong\u003eRO and soft water\u003c\/strong\u003e in soil, coco and hydro, and can be used at every watering. It's typically used to lift the starting EC of RO or soft water (usually to around 0.3–0.4) before your base nutrients go in.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with:\u003c\/strong\u003e \u003ca href=\"\/sq\/products\/plagron-coco-a-b-base-feed-set-copy\"\u003ePlagron Coco A\u0026amp;B\u003c\/a\u003e. You'll get 10% off the A\u0026amp;B when you buy the two together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e a maximum of 1ml per litre of water (1:1000).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRose's Pro-Tip:\u003c\/strong\u003e Shake the bottle, then add CalMag Pro to your water \u003cem\u003efirst\u003c\/em\u003e and stir before adding anything else. Mixing concentrated nutrients straight into each other can make them lock up and drop out of solution. Minerals first, base feed second, extras last.\u003c\/p\u003e\n\u003ch3\u003eWhich Size?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e500ml:\u003c\/strong\u003e treats up to 500 litres of water, ideal for a houseplant collection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Litre:\u003c\/strong\u003e treats up to 1,000 litres, the everyday grower's size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 Litres:\u003c\/strong\u003e treats up to 5,000 litres, great value for larger setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 Litres:\u003c\/strong\u003e treats up to 20,000 litres, the lowest price per litre for big grows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSyringe Only:\u003c\/strong\u003e for measuring that 1ml dose accurately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNPK:\u003c\/strong\u003e 5-0-0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium (Ca):\u003c\/strong\u003e 4.1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium (Mg):\u003c\/strong\u003e 2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e max 1ml per litre (1:1000), every watering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e soil, coco, hydro and houseplants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 500ml, 1 Litre, 5 Litres, 20 Litres\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Plagron","offers":[{"title":"500ml","offer_id":54886432014682,"sku":"PCMP500ML","price":7.99,"currency_code":"GBP","in_stock":true},{"title":"1 Litre","offer_id":54886432047450,"sku":"PCMP1L","price":11.99,"currency_code":"GBP","in_stock":true},{"title":"5 Litres","offer_id":54886432080218,"sku":"PCMP5L","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"20 Litres","offer_id":54886461800794,"sku":"PCMP20L","price":179.99,"currency_code":"GBP","in_stock":true},{"title":"Syringe Only","offer_id":54886432112986,"sku":"BFH-PCMP-SYRNG","price":2.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/9861\/4106\/files\/HYN-2771.jpg?v=1790774428","url":"https:\/\/blackflaghorticulture.com\/sq\/products\/plagron-calmag-pro","provider":"Black Flag Horticulture","version":"1.0","type":"link"}