VIVOSUN Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 1-Pack 48"*20" Heat Mat, for Greenhouse, Seedling, Indoor Germination

This works very well. I use it with a thermostat controller. I’ve started many plants for my garden. I also use it to warm frames of honey before I extract them.

Used this heat mat to germinate more than 200 shishito pepper seeds and had a 99% success rate, almost all seeds germinated. Decreased germination time by almost a week. Great product, would highly recommend.

EDIT - Sorry, I reviewed the mat and the Vovosun Thermostat Controller at the same time! The mat by itself gets too warm without being controlled by a thermostat controller. I wrap this around the bottom of the bottle and stick the probe onto the bottle about half way up. It keeps the temperature within a half a degree to a degree according to the thermometer and it seems pretty accurate when checking with the temp strip on the bottle. It's working great and will make kombucha making much easier through the colder months!

Un tapis de qualité de 4 pieds de long, très large, on pourrais facilement y mettre 4 domes. Je l'ai utilisé quelque fois et il fonctionne a merveille. A utiliser de préférence avec un thermostat numérique, sinon ca peux devenir trop chaud pour les plantes. 5/5

I used it to help root some Alocasia corms, and it worked incredibly! I have a cold room too, but these made my corm seedlings very happy.