Thanks for taking your time to read our information on the best seedling heat mats that are currently available on the UK market. A seedling heat mat is a waterproof mat, and inside the layers of the mat, there are also very small heating coils.
You plug the mat into an electrical socket, and very slowly, the coils heat up and offer a gentle heat, which is ideal to help with the growth of seeds. They are a very good way of getting your seedlings started.
My Top Choices
1. Hyindoor Seedling Heat Mat
Standard size mat of 27.2 x 8.2 x 8.2 cm though they have a double width model available. Runs on 17.5w
Maintains a consistent heat effectively and will easily raise rooting area temperatures approximately 10-20°F above ambient air temperature
Comes with silicone heating wire and heavy duty multi-layer construction
This one is fully waterproof and is pretty tough material
This type of mat will cost you around £1.50 - £2.00 a month to run in elecricity
Ideal heat source for cultivating plants and can effectively provide a uniform heat source to cultivate vegetables/flowers/ seedlings/herbs
Check Amazon UK for Availability - Price when reviewed £14.39 - 88% customer satisfaction based on 1,600+ buyers
2. Homme Seedling Heat Mat
At 10" x 20.75" ( 26.8 x 8.2 x 8.2 cm )the mat is perfect for standard 1020 trays and is a bit bigger than most of the other sellers. This heat mat maintains temperatures of around 20-30℃（68-86℉.
The heating film will never scorches your roots and it produces lots of revitalizing dew when used with a humidity dome. The mat is supple, flexible, ultra-durable and of course fully waterproof.
Using 18 Watts it is pretty cheap to run and can be heated up to 40 ℃（104℉）at an ambient temperature of 20-25 ℃（68-77℉）in minutes.
Check Amazon UK for Availability - Price when reviewed £15.99 - 92% customer satisfaction based on 160+ buyers
3. HAIMIANBAOBAO Seedling Heat Mat
Another standard size mat at 27 x 8 x 8 cm, also running off a low level 17.5w of power. This model had full IP-67 waterproof protection level which you don't see in all of the models. This mat will raise rooting area temperatures 10-20°C above ambient air temperature.
Ideal heat source for cultivating plants and can effectively provide a uniform heat source to cultivate vegetables/flowers/ seedlings/herbs.
Check Amazon UK for Availability - Price when reviewed £17.99 - 90% customer satisfaction based on 60+ buyers
4. LERWAY Seedling Heating Mat
This mat measures 27.3 x 7.3 x 7.2 cm and weighs 460 Grams and is totally waterproof with IP-67 waterproof protection level. This model is a bit more powerful at 21watts.
It's also a good but more expensive than the rest and I can't really give you any explanation for that apart from that extra power. Maybe it's because they promote that is suited for indoor greenhouses as well as for using in the terrarium area, beer brewing etc. Though the rest of the models here can do that too.
Check Amazon UK for Availability - Price when reviewed £27.99 - 88% customer satisfaction based on 1,200+ buyers
What's the best seedling heat mat here?
I can hear myself asking what is the difference between all these mats and really the answer is very little indeed. I am really inclined to just buy the cheapest one as they are pretty much all the same and I think you should just do the same.
If they are waterproof, can put out 17w or higher and will fit the standard tray size then I wouldn't be looking very much further. All these mats will fit that criteria easily so take your pick. they will all cost around the same to run and at £1.50 a month there is not much savings to be had.
If you want to heat a small greenhouse or an area where you are brewing beer then go for the more powerful mat, otherwise the cheapest one is the option to go for. It's not often I will tell you that but in this case it is
I hope this information has been helpful to you and good luck with your propagating
