{"product_id":"the-source-delta-boost-stimulator","title":"The Source Delta Boost Stimulator – Biostimulant for Plants","description":"\u003ch2\u003eAn All-Stage Biostimulant for Vigorous Growth and Heavier Flowering\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Source Delta Boost Stimulator\u003c\/strong\u003e is the all-stage biostimulant in The Source range, the UK-made nutrient line developed alongside \u003cstrong\u003eAutoPot Watering Systems\u003c\/strong\u003e. It is a proprietary blend of \u003cstrong\u003ealgal extracts\u003c\/strong\u003e, \u003cstrong\u003eplant-sourced amino acids\u003c\/strong\u003e and \u003cstrong\u003eglycine betaine\u003c\/strong\u003e, with \u003cstrong\u003enatural plant steroids\u003c\/strong\u003e and their potentiators, including polyglucosides. Through vegetative growth it supports plant health and builds a strong structure; once plants move into flower or fruit it encourages the abundant formation of \u003cstrong\u003efruit and flower sites\u003c\/strong\u003e and the extra \u003cstrong\u003enutrient uptake\u003c\/strong\u003e needed to fill them. It runs at just \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e in growth and \u003cstrong\u003e1 ml per litre\u003c\/strong\u003e in flowering, in soil, coco or hydro, on hard or soft water.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne additive for every stage\u003c\/strong\u003e — \u003cstrong\u003e0.5 ml\/L\u003c\/strong\u003e in growth, \u003cstrong\u003e1 ml\/L\u003c\/strong\u003e through flowering and fruiting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlgal extracts, amino acids and glycine betaine\u003c\/strong\u003e — plant-derived stimulants that support vigour and help plants cope with stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore fruit and flower sites\u003c\/strong\u003e — promotes abundant, widespread site formation once flowering starts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports natural defences\u003c\/strong\u003e — formulated to help plants protect themselves against pests and disease.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo artificial plant growth regulators\u003c\/strong\u003e — The Source range is made from plant-extracted ingredients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAny medium, any water\u003c\/strong\u003e — soil, coco and hydro, hard or soft water, and every watering method.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWeak Flowering and Poor Nutrient Uptake\u003c\/h3\u003e\n\u003cp\u003ePlants that grow strongly in veg can still set few flowering sites, or stall part-way through flowering because nutrient uptake cannot keep pace with demand. Heat, high light intensity and transplant shock make it worse. Delta works on the plant's own processes rather than simply adding more NPK: vigour and structure in growth, then site formation and uptake in flower, so the base feed you already use goes further and plants hold their momentum through to the end of the cycle. The maker reports it has been used and tested by leading UK horticultural universities.\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\u003eGrowth stage:\u003c\/strong\u003e \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e at every feed, in soil, coco or hydro.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoPot systems in soil:\u003c\/strong\u003e start at \u003cstrong\u003e0.2 ml per litre\u003c\/strong\u003e for the first three weeks of growth, then move to 0.5 ml.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlowering and fruiting:\u003c\/strong\u003e \u003cstrong\u003e1 ml per litre\u003c\/strong\u003e at every feed through the flowering schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreenhouse crops\u003c\/strong\u003e such as tomatoes and chillies: 0.5 ml per litre until the first flowers set, then 1 ml per litre for the rest of 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\u003cli\u003e\n\u003cstrong\u003eShake well\u003c\/strong\u003e before measuring, and dose with a syringe for accuracy.\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 All-stage biostimulant (boost stimulator)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents:\u003c\/strong\u003e Algal extracts, plant-sourced amino acids, glycine betaine, natural plant steroids and potentiators including polyglucosides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose rate:\u003c\/strong\u003e 0.5 ml per litre in growth; 1 ml per litre in flowering and fruiting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e 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;\"\u003eDelta Boost Stimulator · soil, coco and hydro · added to the nutrient tank\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 stage, all media\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;\"\u003eAutoPot in soil, growth weeks 1–3\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.2 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e2 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eFlowering and fruiting stage\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\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 own label and feed charts (AutoPot, greenhouse and all other watering methods). 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;\"\u003eCan I use Delta with another brand's nutrients?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe maker designed Delta as part of The Source programme and recommends running it with Gro and Flo rather than mixing in other additives, which can unbalance the 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;\"\u003eDo I need an AutoPot system to use it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. It works with hand watering, drippers, NFT, flood and drain and AutoPot alike, in soil, coco or hydro; AutoPot simply publish extra feed charts for their gravity-fed pots.\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;\"\u003eWhy does my EC go up after adding Delta?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe Source expects the stimulators to add roughly 0.4 to 0.7 to the EC you set with the A and B base. That rise is part of the design, so there is no need to dilute it back down.\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;\"\u003eWill it work with hard tap water?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. The whole Source range is formulated for both hard and soft water.\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\/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\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 0.5–1 ml per litre doses\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 Delta goes in\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"The Source","offers":[{"title":"250ml","offer_id":53931040178442,"sku":"NUT-THES-002-01","price":24.9,"currency_code":"GBP","in_stock":true},{"title":"1L","offer_id":53931040211210,"sku":"NUT-THES-002-02","price":62.9,"currency_code":"GBP","in_stock":true},{"title":"5L","offer_id":53931040243978,"sku":"NUT-THES-002-03","price":218.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/the-source-delta-boost-stimulator-250ml-1.jpg?v=1792294399","url":"https:\/\/hydrocropshop.co.uk\/products\/the-source-delta-boost-stimulator","provider":"Hydro Crop Shop","version":"1.0","type":"link"}