{"product_id":"plagron-nutrients-pk","title":"Plagron Nutrients - PK 13\/14","description":"```html\n\u003csection class=\"gh-product-listing\"\u003e\n\n\u003ch2\u003ePlagron PK 13\/14 — Phosphorus \u0026amp; Potassium Booster for Flowering Stage\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Growers wanting proven yield density and flower quality during the critical flowering phase without premium brand pricing\u003c\/p\u003e\n\n\u003cdiv class=\"gh-our-thoughts\" role=\"note\" aria-label=\"Our thoughts\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOur thoughts\u003c\/strong\u003e\u003cbr\u003e\nThis is a workhorse PK booster that's been delivering consistent results across European grows for years. Plagron know what they're doing with mineral nutrition, and at this price point you're getting a properly formulated product that rivals the premium brands. One a lot of growers rate highly once they've run a cycle with it.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003ePlagron PK 13\/14 is a \u003cstrong\u003econcentrated mineral phosphorus and potassium booster\u003c\/strong\u003e designed specifically for the flowering stage. It provides a direct hit of the two macronutrients plants demand most when they're developing flowers and fruit — phosphorus drives flower formation and density, potassium strengthens structure and finish. Used alongside your base nutrient from week four of flowering onwards, it noticeably increases flower site count, tightens flower clusters, and improves overall crop quality. This is a supplement that actually moves the dial.\u003c\/p\u003e\n\n\u003ch3\u003eHow it compares\u003c\/h3\u003e\n\u003cp\u003ePK boosters sit in a clear market tier. Here's where Plagron lands:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirectly comparable to Canna PK 13\/14 in formulation and results, but significantly cheaper\u003c\/li\u003e\n\u003cli\u003eTransparent mineral formula with no ballast or unnecessary fillers — you're paying for nutrients, not water weight\u003c\/li\u003e\n\u003cli\u003eFaster than organic alternatives, with visible plant response within days of first application\u003c\/li\u003e\n\u003cli\u003eWorks in any growing medium or system — hydro, coco, soil — unlike locked-in nutrient lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe honest comparison: premium brands like Canna and Advanced Nutrients charge a heavy markup for brand recognition. Plagron delivers the same chemistry at better value.\u003c\/p\u003e\n\n\u003ch3\u003eUsage guidance\u003c\/h3\u003e\n\u003cp\u003ePK 13\/14 is straightforward to use, but timing and dosage matter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to start\u003c\/strong\u003e\u003cbr\u003e\nBegin in week four of the flowering phase. If you're flowering early-stage varieties, watch for flower development visually — that's your cue to start dosing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDosage\u003c\/strong\u003e\u003cbr\u003e\nAdd 2ml of PK 13\/14 per litre of nutrient solution (that's a 1:500 ratio). Mix it in first, then add your base flowering nutrient until you hit your target EC. This is a concentrate — it's meant to work alongside, not replace, your main feed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eApplication frequency\u003c\/strong\u003e\u003cbr\u003e\nUse it every watering from week four through to the final flush. It integrates cleanly into any feeding schedule — hydro, hand-watering, drip system, doesn't matter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003epH and water quality\u003c\/strong\u003e\u003cbr\u003e\nMaintain solution pH between 5.5 and 6.5. The product is fully soluble and chlorine-free, so it plays well with most water sources.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReal-world results\u003c\/strong\u003e\u003cbr\u003e\nGrowers consistently report tighter flower clusters, increased flower site density, and improved finish within one to two weeks of starting PK 13\/14. It's a visible upgrade, not a subtle one.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNutrient composition: \u003cstrong\u003e0-13-14 NPK\u003c\/strong\u003e (13% phosphorus, 14% potassium)\u003c\/li\u003e\n\u003cli\u003ePhosphorus content: \u003cstrong\u003e160 grams per litre (as P₂O₅)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePotassium content: \u003cstrong\u003e170 grams per litre (as K₂O)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFormulation: \u003cstrong\u003eTransparent mineral concentrate\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBallast \u0026amp; chlorine: \u003cstrong\u003eFree\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRecommended pH range: \u003cstrong\u003e5.5 – 6.5\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDosage: \u003cstrong\u003e2ml per litre of water (1:500 ratio)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eShelf life (unopened): \u003cstrong\u003e4 years\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable sizes: \u003cstrong\u003e100ml, 250ml, 500ml, 1L, 5L, 10L, 20L\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGrowers running mineral-based nutrient systems (hydro, coco with liquid feeds)\u003c\/li\u003e\n\u003cli\u003eAnyone mid-cycle looking to noticeably upgrade flower quality and density\u003c\/li\u003e\n\u003cli\u003eBudget-conscious growers who want premium results without premium pricing\u003c\/li\u003e\n\u003cli\u003eExisting Plagron users building out a complete feeding programme\u003c\/li\u003e\n\u003cli\u003eFirst-time booster users — the results are obvious enough to justify learning the timing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNot suitable for fully organic growing systems, but compatible with every other medium and method. If you're running mineral nutrition, you've got no compatibility concerns.\u003c\/p\u003e\n\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003ePlagron PK 13\/14 is proper phosphorus and potassium nutrition at a price that actually makes sense. It's been proven across thousands of grows, the formulation is clean, and the results are measurable. You'll see tighter flowers and more of them — that's what you're paying for, and it delivers.\u003c\/p\u003e\n\u003cp\u003eIf you're serious about flowering performance and don't want to overpay for a Dutch label, this is worth picking up while clearance stock lasts. Does exactly what a PK booster should do, week after week.\u003c\/p\u003e\n\n\u003c\/section\u003e\n```","brand":"PLAGRON","offers":[{"title":"250ml","offer_id":47916550684842,"sku":"905985","price":4.99,"currency_code":"GBP","in_stock":true},{"title":"500ml","offer_id":47916550717610,"sku":"905986","price":6.99,"currency_code":"GBP","in_stock":true},{"title":"1 Litre","offer_id":47916550750378,"sku":"811107","price":10.79,"currency_code":"GBP","in_stock":false},{"title":"5 Litre","offer_id":47916550783146,"sku":"811108","price":47.99,"currency_code":"GBP","in_stock":true},{"title":"10 Litre","offer_id":47916550815914,"sku":"905987","price":79.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/5540\/5400\/files\/811107_-_1_litre_2c9414b5-6301-487c-9496-3e7a38ef65e5.jpg?v=1769195841","url":"https:\/\/growershouse.co.uk\/products\/plagron-nutrients-pk","provider":"Growers House ","version":"1.0","type":"link"}