{"product_id":"raw-silica","title":"RAW Silica – Silica Supplement for Plants","description":"\u003ch2\u003eStronger Stems and Cell Walls With pH-Neutral Silica\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRAW Silica\u003c\/strong\u003e from NPK Industries is a soluble powder of \u003cstrong\u003e45% silicon dioxide\u003c\/strong\u003e, derived from diatomite — one of the highest concentrations available to home growers. Unlike the potassium silicates in most liquid silica products, it is a \u003cstrong\u003ebiogenic silica\u003c\/strong\u003e: \u003cstrong\u003epH neutral\u003c\/strong\u003e, it does not cloud the tank, and it can be used at every stage of growth and flowering in soil, coco and hydro.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e45% silicon dioxide\u003c\/strong\u003e – no fillers, stabilisers or added water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforces cell walls\u003c\/strong\u003e – silicon builds into stems and leaves for sturdier growth that holds heavy flowers and fruit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo pH swing\u003c\/strong\u003e – will not push the solution alkaline or cloud it, unlike potassium silicate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter water uptake\u003c\/strong\u003e – raises root permeability, improving drought and heat tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrobe-friendly\u003c\/strong\u003e – a biogenic silica gentle enough to sit alongside beneficial microbes in living soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast and slow release\u003c\/strong\u003e – some particles dissolve straight away, others stay in the root zone for gradual release.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWeak Stems and Stress-Damaged Leaves\u003c\/h3\u003e\u003cp\u003eSilicon is a beneficial element rather than an essential one, but plants that take it up build thicker, stronger cell walls, much as rebar reinforces concrete. That shows as sturdier stems, leaves that resist \u003cstrong\u003epowdery mildew\u003c\/strong\u003e and sap-sucking pests better, and plants that cope better with heat and drought — commercial cucumber growers add silicon to their water for exactly this reason. RAW Silica supplies it without the high pH and clouding that liquid silicates bring to a hydroponic tank.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLabel rate:\u003c\/strong\u003e \u003cstrong\u003e1\/8 to 1\/4 level teaspoon per US gallon (3.8 L)\u003c\/strong\u003e in the reservoir or watering can.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrowth week 1:\u003c\/strong\u003e \u003cstrong\u003e0.16 ml of powder per litre\u003c\/strong\u003e; \u003cstrong\u003egrowth weeks 2–4:\u003c\/strong\u003e \u003cstrong\u003e0.33 ml per litre\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlowering weeks 1–7:\u003c\/strong\u003e \u003cstrong\u003e0.33 ml per litre\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e add it to the diluted feed, not to concentrated nutrient, and keep the tank agitated — it is a flowable powder that suspends rather than fully dissolving.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e soil, coco, hydroponic and foliar programmes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e water-compatible silicon supplement (powder)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents:\u003c\/strong\u003e 45% silicon dioxide (SiO2), derived from diatomite — a non-plant-food ingredient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH effect:\u003c\/strong\u003e neutral; does not cloud the solution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e 1\/8–1\/4 level tsp per US gallon (about 0.16–0.33 ml of powder per litre)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e all of growth and flowering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e soil, coco, hydro; foliar programmes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaker:\u003c\/strong\u003e NPK Industries (RAW Soluble), USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\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;\"\u003eRAW Silica · soil, coco and hydro · in the reservoir\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;\"\u003eGrowth week 1\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.16 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e1.6 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;\"\u003eGrowth weeks 2–4\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.33 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e3.3 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eFlowering weeks 1–7\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.33 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e3.3 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 — RAW's own rates, converted from level teaspoons per US gallon (3.8 L): 1\/8 tsp is about 0.6 ml of powder and 1\/4 tsp about 1.2 ml. Set EC first, then adjust pH, once every base nutrient and additive is in the tank.\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\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;\"\u003eWill RAW Silica raise my pH like liquid silica?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. Most silica additives are potassium silicate, which is strongly alkaline; RAW Silica is silicon dioxide from diatomite and is pH neutral, so it neither lifts the pH nor clouds the solution.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhy doesn't it dissolve completely?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eIt is a flowable powder: part dissolves straight away for quick uptake and the rest stays suspended in the root zone for gradual release. Keep the reservoir moving with an air stone or pump.\u003c\/p\u003e\u003c\/details\u003e\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 beneficial microbes?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. NPK Industries describe it as microbe-friendly — biogenic silica is even used as a carrier for microbial inoculants — so it suits living soil and RAW's own microbe products.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/raw-humic-acid\" 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\/raw-humic-acid.jpg?v=1787263168\u0026amp;width=160\" alt=\"RAW Humic Acid\" 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;\"\u003eRAW Humic Acid\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eRuns alongside Silica on RAW's own feed chart\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/raw-kelp\" 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\/Kelp_MainImage.jpg?v=1786377622\u0026amp;width=160\" alt=\"RAW Kelp\" 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;\"\u003eRAW Kelp\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eRuns alongside Silica on RAW's own feed chart\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"RAW","offers":[{"title":"227g (8oz)","offer_id":53931122458890,"sku":"NUT-RAW1-017-01","price":34.9,"currency_code":"GBP","in_stock":true},{"title":"0.9kg (2lb)","offer_id":53931122491658,"sku":"NUT-RAW1-017-02","price":118.99,"currency_code":"GBP","in_stock":true},{"title":"4.5kg (10lb)","offer_id":53931122524426,"sku":"NUT-RAW1-017-03","price":397.4,"currency_code":"GBP","in_stock":true},{"title":"11.3kg (25lb)","offer_id":53931122557194,"sku":"NUT-RAW1-017-04","price":739.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/raw-silica-8oz-1.jpg?v=1792296250","url":"https:\/\/hydrocropshop.co.uk\/products\/raw-silica","provider":"Hydro Crop Shop","version":"1.0","type":"link"}