{"product_id":"the-source-elements-calmag-stimulator-plus","title":"The Source Elements CalMag Stimulator Plus – For Hydroponics","description":"\u003ch2\u003eCalcium, Magnesium and Anti-Stress Biostimulants in One Concentrate\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Source Elements CalMag Stimulator Plus\u003c\/strong\u003e covers plants' intrinsic need for \u003cstrong\u003ecalcium\u003c\/strong\u003e and \u003cstrong\u003emagnesium\u003c\/strong\u003e, then goes further: its plant-sourced biostimulant elements carry \u003cstrong\u003eanti-stress properties\u003c\/strong\u003e that keep fertiliser uptake and use at their maximum. Calcium builds strong cell walls and healthy new growth; magnesium sits at the centre of chlorophyll, so Elements keys straight into \u003cstrong\u003ephotosynthesis\u003c\/strong\u003e and cellular reproduction and helps drive \u003cstrong\u003enutrient uptake\u003c\/strong\u003e. It is a highly concentrated formula with \u003cstrong\u003eno artificial plant growth regulators\u003c\/strong\u003e, used at \u003cstrong\u003e0.3 ml per litre\u003c\/strong\u003e in soil and \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e in coco and hydro at every stage, on hard or soft water.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium and magnesium\u003c\/strong\u003e — the two secondary nutrients that most often run short in coco, soft water and under strong lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 'plus'\u003c\/strong\u003e — plant-sourced biostimulants with anti-stress properties keep uptake at its maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrives photosynthesis\u003c\/strong\u003e — supports chlorophyll production, vigour, flavour and yield.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery stage\u003c\/strong\u003e — growth, flowering and fruiting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly concentrated\u003c\/strong\u003e — \u003cstrong\u003e0.3–0.5 ml per litre\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil, coco and hydro\u003c\/strong\u003e — on hard or soft water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCalcium and Magnesium Deficiency\u003c\/h3\u003e\n\u003cp\u003eRusty spots and distorted new leaves point to calcium running short; yellowing between the veins of older leaves points to magnesium. Both show up most in coco, which holds on to calcium and magnesium, in soft or RO water that carries little of either, and under high-intensity lighting where plants use more. Elements supplies both in every feed and adds anti-stress biostimulants so plants make full use of them, minimising deficiencies before they mark the leaves.\u003c\/p\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing order:\u003c\/strong\u003e add The Source \u003cstrong\u003eGro or Flo A and B\u003c\/strong\u003e first and set your EC, then add the stimulators. The maker expects EC to climb by about \u003cstrong\u003e0.4 to 0.7\u003c\/strong\u003e once they go in, which is normal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil and compost:\u003c\/strong\u003e \u003cstrong\u003e0.3 ml per litre\u003c\/strong\u003e at every feed, through all stages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoco and hydro:\u003c\/strong\u003e \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e at every feed, through all stages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand watering, drip, NFT and flood and drain:\u003c\/strong\u003e 0.5 ml per litre in growth, rising to \u003cstrong\u003e1 ml per litre\u003c\/strong\u003e through flowering (the maker's chart for these methods).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoPot systems:\u003c\/strong\u003e 0.3 ml (soil) or 0.5 ml (coco and hydro) per litre; the short-season AutoPot charts stop Elements after week 5 of flowering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreenhouse crops\u003c\/strong\u003e such as tomatoes and chillies: \u003cstrong\u003e0.3 ml per litre\u003c\/strong\u003e through the season.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH:\u003c\/strong\u003e set the reservoir to about \u003cstrong\u003epH 5.8\u003c\/strong\u003e for soil and compost and about \u003cstrong\u003epH 5.6\u003c\/strong\u003e for coco or rockwool, as The Source recommends.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Calcium and magnesium supplement with biostimulants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose rate:\u003c\/strong\u003e Soil 0.3 ml per litre; coco and hydro 0.5 ml per litre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e All stages: growth, flowering and fruiting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrowing media:\u003c\/strong\u003e Soil, coco and hydroponics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater:\u003c\/strong\u003e Suitable for hard and soft water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWatering methods:\u003c\/strong\u003e AutoPot, hand watering, drip irrigation, NFT and flood and drain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant growth regulators:\u003c\/strong\u003e No artificial PGRs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e United Kingdom\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e The Source: Gro, Flo, Origin, Alluvium, Delta and Elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hcs-dosing\" style=\"margin:32px 0 0;border:1px solid #e6e6e6;border-radius:12px;overflow:hidden;font-family:Montserrat,-apple-system,'Segoe UI',sans-serif;\"\u003e\n\u003cdiv style=\"background:#101010;padding:16px 20px;border-bottom:3px solid #efc04c;\"\u003e\n\u003cdiv style=\"color:#ffffff;font-size:17px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;\"\u003eFeed Chart\u003c\/div\u003e\n\u003cdiv style=\"margin-top:6px;color:#b8b8b8;font-size:12px;line-height:1.5;\"\u003eElements CalMag Stimulator Plus · soil, coco and hydro · all stages\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;color:#2b2b2b;background:#fff;\"\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003cth style=\"text-align:left;padding:10px 20px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;\"\u003eStage\u003c\/th\u003e\n\u003cth style=\"text-align:right;padding:10px 14px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;white-space:nowrap;\"\u003ePer 1 L\u003c\/th\u003e\n\u003cth style=\"text-align:right;padding:10px 20px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;white-space:nowrap;\"\u003ePer 10 L\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eSoil and compost, all stages\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.3 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e3 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eCoco and hydro, all stages\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.5 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e5 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eOther watering methods, growth (any medium)\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.5 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e5 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eOther watering methods, flowering and fruiting (any medium)\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e1 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e10 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eGreenhouse crops, whole season\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.3 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e3 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background:#101010;padding:12px 20px;font-size:12px;color:#b8b8b8;line-height:1.6;\"\u003e\n\u003cspan style=\"color:#efc04c;font-weight:600;\"\u003eNote\u003c\/span\u003e — The Source's label (soil 0.3 ml, coco and hydro 0.5 ml per litre) and feed charts. Add equal amounts of The Source Gro or Flo A and B to the water first and set your EC, then add the stimulators; the maker expects EC to rise by roughly 0.4 to 0.7 once they are in. Set EC first, then adjust pH.\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eDo I still need Elements on hard tap water?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe Source includes Elements in every one of its feed charts at the rates shown, on hard or soft water: it is part of the programme rather than only a deficiency fix.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eIs it suitable for coco?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. Coco is where calcium and magnesium most often run short; use 0.5 ml per litre at every feed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eCan I use it with another brand's nutrients?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe maker designed it to run with Gro and Flo and recommends the complete Source range rather than mixing in other additives.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWorks Well With\u003c\/h3\u003e\n\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/syringes\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/syringes.jpg?v=1787263354\u0026amp;width=160\" alt=\"Plant Feeding Syringes\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003ePlant Feeding Syringes\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eMeasures the 0.3–0.5 ml per litre dose\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/bluelab-nutrient-truncheon\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Bluelab-nutrient-truncheon-card.jpg?v=1746904762\u0026amp;width=160\" alt=\"Bluelab Nutrient Truncheon\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab Nutrient Truncheon\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSets your EC before Elements goes in\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/autopot-system\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/autopot-system.jpg?v=1787260281\u0026amp;width=160\" alt=\"AutoPot System\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eAutoPot System\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eThe gravity-fed pots the range was developed for\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"The Source","offers":[{"title":"5L","offer_id":53931040276746,"sku":"NUT-THES-003-01","price":52.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/the-source-elements-calmag-stimulator-plus-5l-1.jpg?v=1792294401","url":"https:\/\/hydrocropshop.co.uk\/products\/the-source-elements-calmag-stimulator-plus","provider":"Hydro Crop Shop","version":"1.0","type":"link"}