{"product_id":"house-garden-n27-nitrogen-boost","title":"House \u0026 Garden N27 Nitrogen Boost – High Nitrogen Feed","description":"\u003ch2\u003eA Concentrated Nitrogen Top-Up for Lush, Vigorous Growth\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHouse \u0026amp; Garden N27 Nitrogen Boost\u003c\/strong\u003e, labelled \u003cstrong\u003eN 27% Nitrogen\u003c\/strong\u003e in Europe, is a highly concentrated liquid \u003cstrong\u003enitrogen supplement\u003c\/strong\u003e containing \u003cstrong\u003e27% nitrogen\u003c\/strong\u003e. Made with ammonium nitrate, urea and magnesium sulphate, it supplies nitrogen in fast-acting ammonium, nitrate and urea forms. Added to your normal base feed during \u003cstrong\u003evegetative growth\u003c\/strong\u003e and early flowering, it gives fast-growing, heavy-feeding plants the extra nitrogen they need for leafy growth, strong stems and deep green foliage in \u003cstrong\u003esoil, coco and hydroponic\u003c\/strong\u003e systems.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e27% nitrogen\u003c\/strong\u003e – a very concentrated supplement, used at just \u003cstrong\u003e0.3–0.5 ml per litre\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree nitrogen forms\u003c\/strong\u003e – ammonium, nitrate and urea nitrogen that roots take up and use quickly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreener, healthier leaves\u003c\/strong\u003e – helps prevent the pale, yellowing foliage of a nitrogen shortfall.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStronger structure\u003c\/strong\u003e – supports leaf formation, stem strength and root growth through the vegetative stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted dosing\u003c\/strong\u003e – raises nitrogen on its own, without pushing up every other nutrient in the base feed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll growing media\u003c\/strong\u003e – fully soluble, so it mixes cleanly into feed for soil, coco and every type of hydro system.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePale Leaves and Slow Vegetative Growth?\u003c\/h3\u003e\u003cp\u003eNitrogen is the nutrient plants use most during \u003cstrong\u003evegetative growth\u003c\/strong\u003e. When demand outruns supply – a long vegetative period, large plants in big containers, heavy-feeding varieties or a base feed pitched at an average crop – the lower leaves turn pale and yellow, new growth slows and stems stay thin. Roots convert nitrogen quickly into amino acids, the building blocks of proteins and new cells, so a measured dose of N27 lifts nitrogen on its own and gets plants growing strongly again without raising the strength of the whole feed.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVegetative week 2 to flowering week 1:\u003c\/strong\u003e \u003cstrong\u003e0.3 ml per litre\u003c\/strong\u003e of feed water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlowering weeks 2 and 3:\u003c\/strong\u003e \u003cstrong\u003e0.5 ml per litre\u003c\/strong\u003e (to week 4 on a 10-week flowering cycle).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhen to use it:\u003c\/strong\u003e House \u0026amp; Garden list it as needed only for longer vegetative periods – leave it out of a short veg, or while leaves stay a healthy green.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhen to stop:\u003c\/strong\u003e leave it out from mid-flowering onwards – extra nitrogen late in the cycle works against flower and fruit development.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e add it with your base nutrient and other additives, then check EC and adjust pH last – \u003cstrong\u003e5.7–5.9\u003c\/strong\u003e in hydro, \u003cstrong\u003e5.8–6.3\u003c\/strong\u003e in coco and soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring:\u003c\/strong\u003e use a graduated syringe – doses this small are easy to overdo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e keep sealed between \u003cstrong\u003e7 and 30°C\u003c\/strong\u003e and do not let it freeze.\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\u003eBrand:\u003c\/strong\u003e House \u0026amp; Garden\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e N27 Nitrogen Boost (European label: N 27% Nitrogen)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Liquid nitrogen supplement (EC fertiliser)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrogen (N):\u003c\/strong\u003e 27%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngredients:\u003c\/strong\u003e ammonium nitrate, nitric acid, urea, magnesium sulphate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e clear blue liquid, fully soluble\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH of concentrate:\u003c\/strong\u003e 4–5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose rate:\u003c\/strong\u003e 0.3–0.5 ml per litre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e vegetative week 2 to flowering week 3 (week 4 on a 10-week cycle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable media:\u003c\/strong\u003e soil, coco and hydroponics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e 7–30°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e USA (European formula, not for sale in North America)\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;\"\u003eN27 NITROGEN BOOST · soil, coco \u0026amp; hydro · added to the feed water\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;\"\u003eVegetative 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;\"\u003eNot used\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e–\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eVegetative weeks 2–3\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e0.3 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\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eFlowering 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;\"\u003e0.3 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;\"\u003eFlowering weeks 2–3 (to week 4 on a 10-week cycle)\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;\"\u003eLater flowering\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;\"\u003e–\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 — House \u0026amp; Garden's PRO 8- and 10-week feed charts list N27 as needed only for longer vegetative periods. 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;\"\u003eIs N27 the same as the Nitrogen Boost sold in North America?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. N27 is the European formula at 27% nitrogen, sold as N 27% Nitrogen. Bottles made for North America carry a different analysis, so use the rates on this page, which come from House \u0026amp; Garden's metric PRO feed charts.\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;\"\u003eDo I need it if I already use a base nutrient?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eMost crops get enough nitrogen from a balanced base feed. N27 is for when they need more – longer vegetative periods, large or heavy-feeding plants, or pale lower leaves – and lets you raise nitrogen without strengthening the whole feed.\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 during flowering?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eOnly early on. House \u0026amp; Garden's charts run it to week 3 of flowering, or week 4 on a 10-week cycle. After that, leave it out.\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;\"\u003eWhich growing media does it suit?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eSoil, coco and all hydroponic systems, including recirculating ones. It is fully soluble, so it mixes cleanly into any nutrient tank.\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\/house-garden-aqua-flakes-nutrients\" 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\/House-and-Garden-Aqua-Flakes-1L-medium_landscape.jpg?v=1746904306\u0026amp;width=160\" alt=\"House \u0026amp; Garden Aqua Flakes A\u0026amp;B\" 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;\"\u003eHouse \u0026amp; Garden Aqua Flakes A\u0026amp;B\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eThe hydro base feed it tops up\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/house-garden-coco-nutrients\" 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\/House-and-Garden-Coco-1L-medium_landscape.jpg?v=1746904299\u0026amp;width=160\" alt=\"House \u0026amp; Garden Coco A\u0026amp;B\" 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;\"\u003eHouse \u0026amp; Garden Coco A\u0026amp;B\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eThe coco base feed it tops up\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/house-garden-soil-nutrients\" 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\/house-garden-soil-nutrients.jpg?v=1787262351\u0026amp;width=160\" alt=\"House \u0026amp; Garden Soil A\u0026amp;B\" 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;\"\u003eHouse \u0026amp; Garden Soil A\u0026amp;B\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eThe soil base feed it tops up\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\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 small doses accurately\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"House \u0026 Garden","offers":[{"title":"1L","offer_id":53930842095882,"sku":"NUT-HOUS-021-01","price":41.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/house-garden-n27-nitrogen-boost-1l-1.jpg?v=1792275235","url":"https:\/\/hydrocropshop.co.uk\/products\/house-garden-n27-nitrogen-boost","provider":"Hydro Crop Shop","version":"1.0","type":"link"}