MET Certified Seedling Heat Mat, Seedfactor Waterproof Durable Germination Station Heat Mat, Warm Hydroponic Heating Pad for Indoor Home Gardening Seed Starter(10" x 20")

We were having trouble with our bread proofing in the winter. This heating mat, foam box, and temperature controlled outlet. And it work for regular bread and sourdough.

I purchased the 48" x 20" mat: MET certified Seedling Heat Mat, Seedfactor Waterproof Durable Germination Station Heat Mat, Warm Hydroponic Heating Pad for Indoor Home Gardening Seed Starter(48" x 20"). 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 (VIVOSUN Digital Seedling Heat Mat Thermostat Controller 68-108℉). 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.

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!

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.

So far it works great. After a while, it gets quite warm, you can touch but feels hot.

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!

Price was great. Product came in timely manner. Seems to be doing what it was intended to do.

Great thing to use to start seeds when the weather is cold ❄️