Heat Mat for fermentation and seedlings
Fermentation & Seedling Heat Mat with Thermostat Control – Consistent, Adjustable Warmth for Ferments, Sprouts & Seedlings
Take the guesswork out of fermentation and propagation with our thermostat-controlled Heat Mat, purpose-built to provide reliable, adjustable warmth for ferments, seedlings, sprouts, and microgreens. Whether you're culturing probiotic-rich foods like kombucha, kefir, kimchi, or sourdough, or giving your seedlings a strong start, this mat ensures optimal conditions year-round.
Heat Mat Thermostat Control – Easily set your desired temperature between 20–50°C, giving you full control for different fermentation stages or seed varieties.
Ideal for Fermentation – Keep your ferments at stable, ideal temps—even in cold kitchens or wintery climates.
Please note that although the controller can get up to 50 degrees, this is not always exact transferable heat due to environmental temperatures.
Evenly distributed heat
Accelerate Fermentation and Germination – Boost germination and root development with consistent bottom heat tailored to your plants' needs.
Great for Sprouting – Maintain warmth for sprouting mung beans, alfalfa, wheatgrass, and more.
Safe & Energy Efficient – Waterproof, low-energy design with digital controller and flexible mat for easy use in your home, kitchen, or greenhouse.
This heat mat is waterproof for small splashes of water. It is easy to wipe down and store.
Perfect for:
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Sourdough starters & ferments
Kombucha & kefir brewing
Cultured vegetables (sauerkraut, kimchi)
Seedling trays & microgreens
Winter propagation & sprouting setups
🌀 Customisable warmth = consistent results. From bubbly brews to thriving seedlings, this heat mat supports life at every stage.
Due to being able to select your chosen temperature, these heat mats are perfect for ferments, keeping seedlings warm, germinating seeds and for keeping growing mushrooms warm.
To achieve high heats, it helps to wrap your ferments during cold weather while they are on the heat mat.
Size: 25cm x 52cm
230V 20W
This heat mat is an electrical device:
- Do not submerge the heat mat in water or soil
- Do not puncture with sharp objects
- Fire or electrical shock may result from incorrect usage
- Do not wrap the mat or place insulating materials around the mat, this may result in the heat mat overheating.
- 5 stars: 12 (75%)
- 4 stars: 2 (13%)
- 3 stars: 1 (6%)
- 2 stars: 0 (0%)
- 1 star: 1 (6%)
Easy to use. It was very cold the week I used it so it's better if you turn it up slightly to above the temp you want it at. This counteracts the cold in the room.
This mat has been excellent for my sourdough starter and bulk fermentation as it keeps the ambient temperature steady and in the right zone for growth of the good bacteria.
At last a heat mat with a thermometer yay great idea so i bought two...
Really good easy to use
Heat mat still unsure - need to use it a bit more however great help from Amber.
Tips on the website is very handy too.
My fermentation has started day 2 - excited & thankful for this product!
Ok, mat, I hope it works well.? YJust slow delivery but thanks for being really communicative with me. The post offices fault not your guys. Cheers
Thank you for taking the time to place feedback. Apologies for the courier delays over the Christmas / New Year period. It can be frustrating. Hope you enjoy using your mat. See our blog for support and ideas on use of the heat mat:)
Clear temperature display but unclear on whether there is a right way up. Working fine though I haven't cranked the heat yet.
Easy to use does a great job
Heat Mat is easy to use, does the trick so well. Very pleased with my purchase, thanks.
Excellent for wrapping round and giving that extra heat that is need this time of year with my kombucha
My sourdough starter is bubbling and rising thanks to your heat pad. Best purchase ever.
I got the mat to see if my sourdough levain got better and it did, the quality in improvement of the texture and rise was noticeable. Glad I got it, best thing is that I can have multiple batches brewing for the next step in breadmaking.
I am still waiting for this Heat Mat!!!!!
Hi Elsabe. I had emailed you to let you know that this product is on pre-order and that there has been a delay on this product.
I got the heat mat to help with my yoghurt making as it needed 40 degrees for 5 hours. It worked so well - beautiful thick Skye yoghurt in the fridge after 5 hours on the heat mat. Then I turned it down and put the glass jar with the kombucha on the heat mat to help it with the cool spring temps we have been having - it worked out fantastic. thanks Symbiota.