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Your cart is empty. Nurture your seedlings by ensuring they have a warm area for root growth and germination.
This Seeding Heat Mat speeds up the transplanting process by keeping the soil between 70℉and 85℉.
Intended for indoor use only, this product is waterproof and easy to clean to make storage a breeze.
Available in small medium and large sizes and carries an MET safety certification.
The Seedfactor Seeding Heat Mat adopts the latest 7.5MM thickening,105 degrees of high temperature resistant cylindrical SJTW water-proof power cord (thicker than the general power cord, solid, high temperature resistant), safer and more durable, and guarantee the stability of seedling mat safety work.
Don Starr
August 24, 2025
I purchased the 48" x 20" mat: . It arrived quickly and in excellent condition. As expected, the mat was rolled up for packaging - it flattened out nicely after I let it heat itself up for about an hour.I have various varieties of tomato and pepper seeds that I've started in 4" square pots in my basement (plus a bunch of bare-root strawberries that the nursery decided to ship on April 2nd ... to Colorado ... where the general guideline for putting plants outdoors is Mother's Day).The pots are sitting in plastic food service trays, 10 or 12 pots per tray, on a plastic table. The ambient temp in that part of the basement varies between about 65°F and 70°F, so the soil temp sits around 67°F. Way too cold for those seeds to germinate reliably.I put the mat between the table and the trays, then plugged it into a thermostat (). I set the thermostat to 80°F. Its probe indicated an initial soil temp of 67°F. Even through the trays and with the low ambient and starting soil temps, the mat raised the soil temp to 80°F in about 4 hours. The thermostat is cycling on/off as soil temp moves between 80° and 81°F, drawing the expected 100W when it's on. Of course, there's a substantial soil temp hit (and re-heat time) when I water the seedlings - I should probably use warmer water.I did not insulate the mat from the table, so there's some heat loss there - I can feel it on the underside of the table. I suspect performance might be a little better if I put some cardboard and/or styrofoam between the mat and the table.So far, I'm completely satisfied with this product.UPDATE 21 APR 2018:I tried increasing the target soil temp to 82°F via the thermostat. With ambient temp in the basement dropping down to 60°F overnight during a few days of cold weather, the mat was unable to keep up. It was on 100% of the time and couldn't get the soil even to 80°F. This was not unexpected, as the product description says it "warms root area 10-20°F over ambient temperature".I put some 1" styrofoam (packaging from some assemble-it-yourself furniture) between the mat and the table. The mat is now able to quickly raise the soil temp to 83°F while only on about 70% of the time. (Average duty cycle calculated from total kWh used, total hours elapsed, and 100W).I may also replace the plastic food service trays with aluminum half-sheet pans for better heat transfer between the mat and the pots.
NS
August 20, 2025
So far it works great. After a while, it gets quite warm, you can touch but feels hot.
Linda Aucoin
August 9, 2025
This warming mat fits perfectly in my prop box and has helped to speed up the rooting process. My pups are loving the warmth. After 1 week, they are already showing signs of roots. I just wish it came in other colors, but a small pillow case helps blend it in seamlessly. Love it!
Andrea J. Kippels
July 4, 2025
Arrived as expected, works perfectly as advertised to support growth of seedlings. There is only one temperature - no temp adjustment feature but since I am a beginner, I did not require temperature adjustment or control. This seedling heating mat stays at the constant temperature that supports growth. It is waterproof as there were no issues with misting the seedlings. I am satisfied with the performance of this product and recommend it. Be advised that your pets may move in!
bb monroe
May 12, 2025
this makes an excellent heat mat for my seedlings, even though there’s no thermostat to adjust it, it stays on perfectly the right temperature. I have tried several high priced heat mats and they come nowhere close to these. I’d like it so much. I even bought a second one and I started on a second batch of seeds. I would highly recommend this.
Alex haley
April 27, 2025
Does what it's supposed to do lol
Yardley
April 22, 2025
Seems to have made a big difference in early sprouting of seedlings.
Bryan Hampton
April 7, 2025
Great thing to use to start seeds when the weather is cold â„ï¸
Rahul Thakur
April 4, 2025
Good product. As seller is shipping it outside US too, he should have mentioned it rating at 110V AC on the product page. I had to buy an additional convertor costing more than the pad itself. Still worthwhile as it is not available in India.
Miriam
March 9, 2025
I started brewing kombucha a few weeks ago and quickly realised that the temperature in my place is far from what's recommended for kombucha. So I bought this mat and now my Scoby is much happier (and the kombucha is ready much faster). However, you do need a thermostat with it unless you don't care how high the temperature goes. With a thermostat it seems to be working perfectly fine.
Tradesman
February 26, 2025
Works fine, hopefully this will last for a few years. Have it on a temp controller and timer with no issues so far.
Mike C
February 21, 2025
I ordered this so I don’t have to worry about it too much. Plug and play. It seems well made and heats pretty evenly and nicely. I used it with seeds planted in soil that are being used for bonsai and started getting sprouting 3 days later.
jennell castillo
January 29, 2025
Love this product. I'm growing hot peppers and this has helped throughout the whole process from germinating my pepper seeds and helping to keep my soil warm for optimal plant growth. The product does come rolled up but flattens overtime
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