{"product_id":"the-source-alluvium-pk-stimulator","title":"The Source Alluvium PK Stimulator – PK Booster for Plants","description":"\u003ch2\u003eConcentrated Phosphorus and Potassium for Prolific Flowering\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Source Alluvium PK Stimulator\u003c\/strong\u003e is the flowering and fruiting booster in The Source range: a very concentrated formulation with a balanced \u003cstrong\u003eNPK of 0-18-20\u003c\/strong\u003e. Its high-purity \u003cstrong\u003ephosphorus\u003c\/strong\u003e helps plants draw and store more energy from light, encouraging abundant, widespread formation of \u003cstrong\u003eflower and fruit sites\u003c\/strong\u003e, and the maker says it brings flowering forward so crops have longer to develop. The \u003cstrong\u003epotassium\u003c\/strong\u003e drives sugar and starch production and regulates water and nutrient transport, so fruit and flowers keep filling out with good flavour and colour. Alluvium contains \u003cstrong\u003eno artificial plant growth regulators\u003c\/strong\u003e and is dosed from just \u003cstrong\u003e0.1 ml per litre\u003c\/strong\u003e in soil and \u003cstrong\u003e0.2 ml per litre\u003c\/strong\u003e in coco and hydro.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNPK 0-18-20\u003c\/strong\u003e — high-purity phosphorus and potassium aimed at the flowering and fruiting stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProlific flowering\u003c\/strong\u003e — supports abundant, widespread flower and fruit site formation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuller fruit and better flavour\u003c\/strong\u003e — potassium manages sugar and starch production as fruit and flowers develop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely concentrated\u003c\/strong\u003e — from \u003cstrong\u003e0.1 ml per litre\u003c\/strong\u003e in soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo artificial PGRs\u003c\/strong\u003e — part of The Source's plant-extract range.\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\u003eWhy Do Plants Stall Mid-Flowering?\u003c\/h3\u003e\n\u003cp\u003eOnce flowering is under way, a plant's demand for phosphorus and potassium climbs faster than a balanced base feed supplies. The signs are fewer flower and fruit sites, slow development in the middle weeks and fruit short on flavour. Alluvium tops up P and K as that demand rises, starting low in early flowering and stepping up as plants bulk up, so nutrient uptake keeps pace with the crop rather than falling behind it.\u003c\/p\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlowering and fruiting only\u003c\/strong\u003e — Alluvium is not used during growth.\u003c\/li\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:\u003c\/strong\u003e \u003cstrong\u003e0.1–0.4 ml per litre\u003c\/strong\u003e (label). AutoPot soil chart: 0.1 ml for the first three weeks of flowering, then 0.4 ml.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoco and hydro:\u003c\/strong\u003e \u003cstrong\u003e0.2–0.4 ml per litre\u003c\/strong\u003e (label). AutoPot coco and hydro chart: 0.2 ml for weeks one to four, then 0.4 ml.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand watering, drip, NFT and flood and drain:\u003c\/strong\u003e 0.2 ml for weeks one and two, 0.25 ml for weeks three and four, then \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e from week five.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreenhouse crops\u003c\/strong\u003e such as tomatoes and chillies: \u003cstrong\u003e0.2 ml per litre\u003c\/strong\u003e from the start of flowering 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 PK stimulator, flowering and fruiting booster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNPK:\u003c\/strong\u003e 0-18-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose rate:\u003c\/strong\u003e Soil 0.1–0.4 ml per litre; coco and hydro 0.2–0.4 ml per litre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e Flowering and fruiting only\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;\"\u003eAlluvium PK Stimulator · soil, coco and hydro · flowering and fruiting stage\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\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003eNot used\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003eNot used\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eSoil, early flowering (AutoPot 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;\"\u003e0.1 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e1 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eCoco and hydro, early flowering (AutoPot weeks 1–4)\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.2 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 style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eAutoPot, mid to late flowering\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.4 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e4 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, flowering weeks 1–4\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.2–0.25 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e2–2.5 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 week 5 on\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;\"\u003eGreenhouse crops, through flowering and fruiting\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\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 0.1–0.4 ml, coco and hydro 0.2–0.4 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;\"\u003eWhen do I start using Alluvium?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eAt the start of flowering or fruiting, at the low rate, raising it as plants bulk up. It is not used during the growth stage.\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 Alluvium with another brand's base nutrient?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe Source recommends running it as part of its own programme with Flo A and B, and advises against adding other products that may 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;\"\u003eIs it suitable for drip and AutoPot systems?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. It was formulated to optimise AutoPot Watering Systems and the maker publishes charts for drip irrigation, NFT, flood and drain and hand watering too.\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 doses from 0.1 ml per litre\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\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 Alluvium goes in\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"The Source","offers":[{"title":"1L","offer_id":53931040112906,"sku":"NUT-THES-001-01","price":49.9,"currency_code":"GBP","in_stock":true},{"title":"5L","offer_id":53931040145674,"sku":"NUT-THES-001-02","price":173.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/the-source-alluvium-pk-stimulator-1l-1.jpg?v=1792294397","url":"https:\/\/hydrocropshop.co.uk\/products\/the-source-alluvium-pk-stimulator","provider":"Hydro Crop Shop","version":"1.0","type":"link"}