{"product_id":"root-t-heat-mat-thermostat","title":"Root!T Heat Mat Thermostat – Propagator Temperature Control","description":"\u003ch2\u003eHold Your Propagator at the Temperature You Set\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eRoot!T Heat Mat Thermostat\u003c\/strong\u003e is a plug-through digital controller that switches a heat mat on and off to keep a propagator at a chosen \u003cstrong\u003eminimum temperature\u003c\/strong\u003e. Its probe reads the air under the lid or the temperature inside the growing medium, the display shows the live reading in \u003cstrong\u003e°C or °F\u003c\/strong\u003e, and the output socket powers any heat mat – or other heating device – up to \u003cstrong\u003e1000W\u003c\/strong\u003e. Set it once and seedlings and cuttings get steady warmth through cold nights without the tray cooking on a sunny afternoon.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10–30°C setting range\u003c\/strong\u003e – covers every propagation target from cool-season seeds to warm cuttings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 1000W \/ 4.3A\u003c\/strong\u003e – runs one heat mat or several, as long as the total stays within the load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir or root-zone sensing\u003c\/strong\u003e – hang the probe on its rubber sucker for air temperature, or push it into the medium for substrate temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear digital display\u003c\/strong\u003e with HEATING and POWER indicator lights, switchable between °C and °F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple three-button setting\u003c\/strong\u003e – SET, UP and DOWN\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1-year manufacturer’s warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOverheating and Cold Nights in the Propagator\u003c\/h3\u003e\u003cp\u003eA heat mat on its own is either on or off. Left on, a lidded propagator can climb well past 25°C on a mild day, drying plugs and stressing tender roots; switched off, the root zone drops on a cold night and germination and rooting stall. A thermostat with its probe in the tray closes that gap: the mat runs only when the temperature falls below your target, so growth stays steady and the mat costs less to run. Root!T recommend \u003cstrong\u003e18–22°C\u003c\/strong\u003e for seeds and about \u003cstrong\u003e22°C\u003c\/strong\u003e for cuttings.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlace the probe\u003c\/strong\u003e in the propagator – hang it with the rubber sucker for air temperature, or push it into the growing medium for root-zone temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the thermostat body outside\u003c\/strong\u003e the propagator, where it and its output socket stay dry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug the heat mat\u003c\/strong\u003e into the thermostat’s output socket, then plug the thermostat into the mains – the POWER light comes on\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet the target:\u003c\/strong\u003e press SET to view it; hold SET for 3 seconds until the display flashes, adjust with UP\/DOWN, then press SET again\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRead the lights:\u003c\/strong\u003e HEATING lit means the reading is below target and the mat is on; unlit means the mat is off\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\u003eInput:\u003c\/strong\u003e 230V \/ 50Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum load:\u003c\/strong\u003e 1000W \/ 4.3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetting range:\u003c\/strong\u003e 10–30°C (50–86°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e digital, °C or °F, with HEATING and POWER indicators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e remote temperature probe with rubber sucker\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e SET, UP and DOWN buttons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn the box:\u003c\/strong\u003e thermostat unit with plug, output socket and temperature probe; multi-language instructions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e indoor use; keep the thermostat body and socket dry – do not submerge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 year\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Root!T (HydroGarden)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\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;\"\u003eWill it work with heat mats from other brands?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. It switches whatever is plugged into its socket, so any heat mat – or a small heater or heated propagator – works as long as the total load is no more than 1000W (4.3A).\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 run more than one heat mat from it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes, through a multi-way adaptor in the output socket, provided the combined wattage stays under 1000W. Put the probe in the tray that matters most, as all the mats switch together.\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;\"\u003eShould the probe measure air or compost temperature?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eEither. Hung on its sucker it controls the air under the lid; pushed into a plug or cube it controls the root zone, which is the better choice for cuttings and for seeds that need bottom heat.\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 it control cooling as well?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. It is a heating thermostat: it switches the socket on when the reading is below your target and off when it is above.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\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\/propagation-heat-mat\" 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\/grow-gadgets-propagation-heat-mat-45w-medium_landscape.jpg?v=1746904961\u0026amp;width=160\" alt=\"Propagation Heat Mat\" 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;\"\u003ePropagation Heat Mat\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eA heat mat for the thermostat to switch\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/large-budget-propagator\" 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\/large-budget-propagator.png?v=1787262443\u0026amp;width=160\" alt=\"Large Budget Propagator 58cm\" 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;\"\u003eLarge Budget Propagator 58cm\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eVented propagator to hold the probe\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/root-t-plug-refill-bag-60\" 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\/grow-media-rootit-dry-pest-free-propagation-rooting-cells-40129398538455.png?v=1786377580\u0026amp;width=160\" alt=\"Root!T Propagation Plug Refill Bag\" 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;\"\u003eRoot!T Propagation Plug Refill Bag\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003ePeat-free plugs to root-zone sense\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Root!T","offers":[{"title":"Default Title","offer_id":53930930864394,"sku":"HYD-ROTT-001-01","price":29.9,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/root-t-heat-mat-thermostat-default-title-1.jpg?v=1792284485","url":"https:\/\/hydrocropshop.co.uk\/products\/root-t-heat-mat-thermostat","provider":"Hydro Crop Shop","version":"1.0","type":"link"}