{"product_id":"canna-rhizotonic","title":"Canna Rhizotonic (New Improved Formula)","description":"\u003ch3\u003eThe root stimulator UK growers trust — now better\u003c\/h3\u003e\n\u003cp\u003eCanna Rhizotonic is a concentrated natural extract of North Atlantic seaweed (\u003cem\u003eAscophyllum nodosum\u003c\/em\u003e) — the root enhancer and stress reliever most UK growers started with, and the new improved formula is the biggest update in its history. It helps cuttings, seedlings and transplants throw down a productive, healthy root system fast, which means better water and nutrient uptake and a plant that can shrug off stress instead of stalling.\u003c\/p\u003e\n\u003cp\u003eA strong root zone is the foundation of every harvest. More root mass means faster uptake, quicker establishment after re-potting, and real resilience against heat and drought shock. Rhizotonic is where that foundation gets built.\u003c\/p\u003e\n\u003ch3\u003eWhat's new in the improved formula\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore concentrated seaweed extract.\u003c\/strong\u003e A revised production process boosts the organic compounds that trigger the plant's own root-growth hormones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlant-friendly pH (~4.7, down from ~12.5).\u003c\/strong\u003e Solutions need far less correction, and the old formula's fishy smell is largely gone — the new version smells sweeter and pours slightly darker.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-year shelf life in the bottle\u003c\/strong\u003e (double the old formula) and high stability once diluted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal EC contribution\u003c\/strong\u003e — gentle enough for germination, where it helps soften hard seed casings so the tap root emerges more easily.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e(Sold in North America as \"Rhizotonic XP\" — same update, different regional name. UK stock carries standard Rhizotonic labelling.)\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy growers use Rhizotonic\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRapid new root growth on cuttings, seedlings and freshly re-potted plants\u003c\/li\u003e\n\u003cli\u003eStress relief and recovery — re-potting shock, heat, drought\u003c\/li\u003e\n\u003cli\u003eWorks on \u003cstrong\u003eany substrate\u003c\/strong\u003e: soil\/peat mixes, coco, and inert hydro media like pebbles and rockwool\u003c\/li\u003e\n\u003cli\u003eSuitable as a foliar spray for a direct route into stressed plants\u003c\/li\u003e\n\u003cli\u003eCan support healthy substrate micro-life; seaweed extracts of this type have also been linked to improved flavour and quality in the finished harvest\u003c\/li\u003e\n\u003cli\u003eVegetable-based formula rich in organic compounds, vitamins and minerals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGenuine UK stock — why it matters\u003c\/h3\u003e\n\u003cp\u003eAll our Canna stock is sourced through the official UK supply chain: English-language labels with UK dosing instructions, the current new-formula bottles (best-before March 2028 or later), and full manufacturer backing. Cheaper listings you may see elsewhere are often grey imports labelled for the Spanish or French markets — older stock, foreign-language instructions, and no UK support chain behind them. With a formula this recently updated, knowing exactly which version is in the bottle matters.\u003c\/p\u003e\n\u003ch3\u003eHow to use Canna Rhizotonic (dosage)\u003c\/h3\u003e\n\u003cp\u003eShake the bottle well before use, and always correct pH \u003cstrong\u003eafter\u003c\/strong\u003e adding your base nutrients and additives.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eStage\u003c\/th\u003e\n\u003cth\u003eDose\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirst dose \u0026amp; re-potting\u003c\/td\u003e\n\u003ctd\u003e40ml per 10L (4ml\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVegetative growth\u003c\/td\u003e\n\u003ctd\u003e20ml per 10L (2ml\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGenerative (flowering)\u003c\/td\u003e\n\u003ctd\u003e5ml per 10L (0.5ml\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003eUse the full first-dose rate whenever you re-pot.\u003c\/li\u003e\n\u003cli\u003eIn recirculating or drip systems, renew the nutrient solution every 5–7 days — Rhizotonic is organic material and shouldn't sit in tanks or lines indefinitely.\u003c\/li\u003e\n\u003cli\u003eDon't be tempted to overdose: over-fertilisation harms the substrate and the plant. The tiered rates above are the schedule.\u003c\/li\u003e\n\u003cli\u003eFor cuttings and stressed plants, a foliar mist gets Rhizotonic in fastest.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eRoot stimulator \/ stress reliever\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003ctd\u003e\n\u003cem\u003eAscophyllum nodosum\u003c\/em\u003e North Atlantic seaweed extract\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormula\u003c\/td\u003e\n\u003ctd\u003eNew improved formula (\"XP\" outside the UK)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDosage\u003c\/td\u003e\n\u003ctd\u003e40 \/ 20 \/ 5 ml per 10L (first dose \/ veg \/ flower)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia\u003c\/td\u003e\n\u003ctd\u003eAll substrates — soil, coco, hydro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEC\u003c\/td\u003e\n\u003ctd\u003eMinimal addition when diluted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e~4.7 (was ~12.5) — correct pH after all additions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShelf life\u003c\/td\u003e\n\u003ctd\u003e2 years — store closed, dark, frost-free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSizes\u003c\/td\u003e\n\u003ctd\u003e250ml · 1L (stocked) — 5L\/10L exist in the range, not currently stocked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOld formula vs new formula\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eOld Rhizotonic\u003c\/th\u003e\n\u003cth\u003eNew Rhizotonic\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlgae concentration\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eIncreased\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e~12.5\u003c\/td\u003e\n\u003ctd\u003e~4.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmell\u003c\/td\u003e\n\u003ctd\u003eFishy\/sulphurous\u003c\/td\u003e\n\u003ctd\u003eSweeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShelf life\u003c\/td\u003e\n\u003ctd\u003e12 months\u003c\/td\u003e\n\u003ctd\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilution rates\u003c\/td\u003e\n\u003ctd\u003e40\/20\/5 per 10L\u003c\/td\u003e\n\u003ctd\u003eUnchanged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch3\u003eIs this the new formula \/ \"Rhizotonic XP\"?\u003c\/h3\u003e\n\u003cp\u003eYes. All stock we ship is the new improved formula. \"XP\" is the name used for the same update in North America — UK bottles carry standard Rhizotonic branding. New-formula bottles have a best-before date of March 2028 or later, a sweeter smell, and a slightly darker pour.\u003c\/p\u003e\n\u003ch3\u003eHow much Rhizotonic per litre?\u003c\/h3\u003e\n\u003cp\u003e4ml\/L for the first dose and whenever you re-pot, then 2ml\/L through veg and 0.5ml\/L in flower. Shake well first, and correct pH after adding everything to the solution.\u003c\/p\u003e\n\u003ch3\u003eCan I use Rhizotonic in soil \/ coco \/ hydro?\u003c\/h3\u003e\n\u003cp\u003eYes — it's suitable for every substrate and irrigation system, from peat mixes and coco to pebbles and rockwool. It pairs naturally with \u003ca href=\"\/products\/canna-terra-professional-plus\"\u003eCanna Terra Professional Plus\u003c\/a\u003e in soil and \u003ca href=\"\/products\/canna-coco-professional-plus\"\u003eCoco Professional Plus\u003c\/a\u003e in coco — see our \u003ca href=\"\/pages\/canna-feed-chart\"\u003eCanna feed chart guide\u003c\/a\u003e for full schedules by medium.\u003c\/p\u003e\n\u003ch3\u003eDo I stop using it in flower?\u003c\/h3\u003e\n\u003cp\u003eNo — you taper, not stop. The generative rate is 0.5ml\/L. In flower it works alongside \u003ca href=\"\/products\/canna-cannazym\"\u003eCannazym\u003c\/a\u003e for root-zone maintenance, \u003ca href=\"\/products\/canna-boost\"\u003eCanna Boost\u003c\/a\u003e and \u003ca href=\"\/products\/canna-pk-13-14\"\u003ePK 13\/14\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDoes the new formula change my pH routine?\u003c\/h3\u003e\n\u003cp\u003ePossibly. The old formula's pH ~12.5 pushed solutions up; the new ~4.7 doesn't. Keep checking as normal — depending on your water you may now need less correction, or a nudge upward rather than down.\u003c\/p\u003e\n\u003ch3\u003eCan I use it from seed?\u003c\/h3\u003e\n\u003cp\u003eYes — its low EC makes it germination-friendly, and it can help soften hard seed casings so the tap root breaks through more easily.\u003c\/p\u003e\n\u003ch3\u003eHow long does a bottle last?\u003c\/h3\u003e\n\u003cp\u003eTwo years unopened\/closed, stored dark and frost-free. Once diluted it stays stable, but renew reservoir solution every 5–7 days in recirculating or drip systems.\u003c\/p\u003e","brand":"Canna","offers":[{"title":"1L","offer_id":56008139997569,"sku":"RHIZO1L","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"250ml","offer_id":56008140030337,"sku":"RHIZO250","price":12.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0525\/9060\/8574\/files\/prod-additives-canna-rhizotonic-sticker_png.webp?v=1785592772","url":"https:\/\/ledgrowshop.co.uk\/products\/canna-rhizotonic","provider":"LED GROW SHOP UK","version":"1.0","type":"link"}