VIVOSUN 10"x 20.75" Seedling Heat Mat and Digital Thermostat Combo Set, UL & MET-Certified Warm Hydroponic Heating Pad for Germination, Indoor Gardening, Greenhouse

Bought VIVOSU Heat Mat with external controller & temp probe to use with Ferry Morse seedling tray & seedling containers. Also using blue & red LED hanging light, not shown Added Ferry Morse humidity dome. VIVOSUN mat under tray. Probe from controller inserted into one container at a time. Display can stay on continuously for easily walking into room & immediately seeing soil temp. Display & controls are very visible & easy to operate correctly. Obtaining very good seed growth due, in part, to good warmth contribution from mat. First bought VIVOSUN mat w/o probe. Controller was not controlling heat accurately. For a test, set to 100 deg F on setting display. Actual mat temp display showed 100 degrees but could touch mat & it was only slightly warm. Also, power cord inside mat, on top, on that mat protruded above overall mat height towards center. Required adding cardboard shims on cord side to have level tray with consistent temperature & light. Returned 1st mat and bought Seedling Heat Mat and Thermostat Combo Set. Delighted with performance of Combo Set!

This heat mat looks and works great. The digital control is easy to adjust from celsius to degrees and can be adjusted to the desired temp for the seeds you are working with. There is a thermostat connected probe that is placed in the planting area and it comes with a small chart that gives you the recommended temperature for the different plants. The water proof mat is easy to clean and is just the right size for my shelving unit.

It will raise the soil temperature by 10 degrees over ambient room temperature. For seed starts that require a higher soil temperature this heat mat does its job and does it well. With the temperature probe you know what the soil temperature is. I’m looking forward to having hot peppers to transplant into my garden and have a jump on my growing season. It covers the entire bottom of my seed tray. The temperature in the picture is 79.5 degrees.

Only 4 stars because it doesn't always hold temperature sometimes it goes over it a few degrees and doesn't adjust. Not the worst if youre using for plants they wont mind but if youre trying to dial something in itll be something to keep in mind.

Update to my review—I received the new replacement unit today and the new thermostat is working. Amazon and Vivosun quickly resolved my issue and sent a replacement that took only two days to arrive. Thanks to both Companies for taking care of this! I’ve increased my original 3 star review to 5 stars! Testing it out—you set the thermostat to a temperature, I.e. 74 degrees (Fahrenheit) and insert the temperature probe into the soil or growing medium. If the probe is reading less than the desired temperature it will run the heating pad until the medium is heated to the temperature you want it. My new replacement unit shows all this in degrees Fahrenheit, and let’s you program the temperature in Fahrenheit. The first “defective” one only showed it in degrees Celsius and could only be set to temperatures in Celsius before displaying the Fahrenheit Temperature. The new heating pad, like the previous one works, no issues there. Keep I’m mind though it plugs into the thermostat, the thermostat does not set or regulate the temperature of the heating pad. The heating pad will be warmer than the temperature displayed on the thermostat—as the thermostat is only monitoring the temperature of the soil or growing medium. Once it reaches the set temperature it shuts off power to the heating pad. My older review from earlier this week dealing with the defective thermostat: I am in the process of returning the combination seedling heating pad and thermostat because the thermostat doesn’t work. The unit I received did not supply power to the heating pad. I had set up everything as per the instructions and kept an eye on it, noticing that the “heating” light never came on with the pad plugged in. So I took a non contact thermometer and checked the pad temperature—it was room temp and nothing more, then plugged in an outlet tester (in the photos) to check the thermostat plug in for the heating pad and there was nothing. I’m assuming it’s not wired correctly and contacted Vivosun’s support via email. I emailed them Sunday and have not heard anything back yet, so I decided to exchange the item through Amazon—which had a very easy and efficient way of handling the exchange—they are sending me a new one which I hope works correctly and I have to drop the defective one off at my nearest Kohl’s store customer service department to be sent back to Amazon. I’ll have to update this once I get the replacement unit and can better judge the thermostat. The heating pad works very well and I had to manually regulate the temperature to sprout my seeds. It seems very heavy duty for the wattage it works on and should last a few seasons. I know it’s offered separately from the combination set I had ordered. If it had worked right, the thermostat was easy to set to the temperature on and I like how the probe is designed. The only other complaint I had was that you have to set the temperature in Celsius—but it will display the temperature in Fahrenheit. Some conversion work needs to be done if you want to set it at 80 degrees F for tomatoes. Had it worked and controlled the heating pad, had Viviosun contacted me back with their advice on what to do (it’s rumored on Facebook they are not responding to emails possibly because of being located in China and not working due to current events), I would have given this a 5 star review and written how well it works. Hopefully I can post that review once I get a properly working replacement.

This seedling heat mat with thermostat has been a staple in my indoor gardening setup for the past three seed-starting seasons, and it’s performed flawlessly. It delivers steady, controlled warmth that helps boost germination rates and keeps seedlings happy—no issues, no hassle. Pros: ✅ Consistent Heating – Ideal temp range for seed starting ✅ Thermostat Works Great – Simple to set and monitor ✅ Durable – Still going strong after multiple seasons ✅ UL & MET Certified – Safe for indoor and greenhouse use Cons: ❌ None so far! Final Thoughts: If you're serious about germination success, this combo set is absolutely worth it. Plug it in, set your temp, and let it do its job—it’s reliable season after season.

If you are an impatient gardener like me, you will love this thing. It really speeds up the germination time. Some seeds they used to take a week or 10 days germinating about three or four days. it seems to distribute the heat evenly without making it too hot which I guess could be dangerous. It seems to be designed well. The cord thick enough, that I don’t worry about it causing a fire. So far, it looks like it will last and provide the expected reliability for many seasons to come. Good value for the money.

Works pretty good for 55 gallon hermit crab tank. Stays consistent.

Pad y termostato muy buenos

I recently purchased the Heat Mat and Digital Thermostat combo, and I couldn't be more impressed. This product is a game-changer for anyone in need of precise temperature control for their reptile terrariums or seedling propagation. First and foremost, the heat mat provides consistent and gentle warmth, creating the perfect environment for my plants or reptiles to thrive. The size options available make it versatile for various terrarium or seedling tray sizes. The digital thermostat is incredibly easy to use and allows me to set and maintain the ideal temperature with pinpoint accuracy. The large, clear display makes it easy to monitor and adjust settings as needed, ensuring optimal conditions at all times. Installation was a breeze, thanks to the detailed instructions provided. I appreciate the durable construction of both the heat mat and thermostat, ensuring longevity and reliability. Overall, I highly recommend this Heat Mat and Digital Thermostat combo to anyone looking for top-notch quality and performance. It's a five-star product that has exceeded my expectations in every way possible!

Très fiable. Excellent pour starter des semis. Étant dans un coin assez froid, c'est un must pour un jardin productif l'été! Ici l'été est trop court. Pouvoir donner un boost avec ce tapis facile a régler qui a un thermostat pour gérer la température c'est parfait ! ***tomates, piments forts, poivrons***

Exactly what I needed for propagating a few clones. The mat itself is IP67 and seems durable. I can see why this would work well for fermentation, the heating mat is very flexible and just the right length to wrap around a 1 gallon jug. For my purposes I needed a heating mat to warm 4x glass mugs that hold seedling cups (the red plastic kind with removable humidity dome) to propagate a few clones, and it works exactly as I need it to, with temperature probe taped to the bottom side of one of the glass cups to maintain the proper heat for rooting. For the price (28CAD) at the time, its a fair price, although the mat is smaller in person than what the pictures make it seem - like laying 3 phones end to end in size. The thermostat itself would be useful for more than just regulating the heating mat on and off, limited to 1000W according to manual.

Easy to control for your aquarium