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Size: 10"x20.75"
Features
- Reliable Results: The VIVOSUN professional heat mat maintains optimal temperatures around 68-86F (20-30C), perfect for Seedling start and cutting propagation; Made from durable PVC material, it's designed to last
- Stable & Uniform Heat: The advanced far-infrared heating technology of this heat pad provides your plant with a warm environment to create optimal conditions for speeding up germination and accelerating the growth rate; The strengthened heating film with double insulation layers ensures this durable mat will not scorch the root and can produce plenty of invigorating dew when being used in combination with a humidity dome
- Built to Last: Designed with soft, flexible, and ultra-lasting material, this warming mat goes beyond stringent MET standards; The IP67 rating waterproof surface is easy to clean that enables safe scrubbing; Note: please only use the product indoors and do not immerse it in the water; Equipped with a carrying bag in the package, you can simply roll it up and pack it away, which is handy to move to different places; This product does not specify any expiration date
- Great Combination: This warming mat also runs on only 20 Watts to help you save on electricity; Combined with VIVOSUN thermostat, it can not only use for plant sprouting and other indoor gardening but also for home brewing and terrarium warming, meeting your different daily needs
- Innovative Heating: With the radiate far-infrared light wave, this seedling heat mat makes the heat source softer and provides enough heat, which can be heated up to 40 C(104F)at an ambient temperature of 20-25 C(68-77F)in minutes; We recommend using it with the VIVOSUN thermostat controller and humidity dome
Description
Who are we? VIVOSUN is the global leader for at-home growing technology & equipment. With over 10 years of demonstrated excellence in the development and production of growing tools,we have established ourselves as a trusted partner for every step in the growing process and for every level of grower. Vivosun's seedling heat mats provide efficient heat conversion and even distribution, boosting plant growth in the initial stage. Indoor gardening can be complex. We simplify it by integrating technology that optimizes light, airflow, and environmental control. Our smart systems make gardening easier, helping both beginners and experts achieve thriving plants effortlessly. Vivosun combines innovation, quality, and sustainability. Our smart products—such as Vgrow, AeroLight, AeroZesh, and GrowHub—streamline gardening with automated controls and energy-efficient features, ensuring better growth outcomes while reducing environmental impact. Seedling Heat Mat Set Seedling Heat Mat Seedling Heat Mat Seedling Heat Mat Thermostat Controller Seedling Heat Mat, 2-Pack T5 Linear Grow Lights
Indoor/Outdoor Usage: Indoor
Brand: VIVOSUN
Material Feature: Gluten Free
Color: Black
Special Feature: Extended Bloom Time
Expected Blooming Period: Summer to Autumn
Item Weight: 16 ounces
Number of Items: 1
Item Highlight: UL & MET-Certified Warm Hydroponic Heating Pad for Germination, Indoor Gardening, Greenhouse
UPC:
Indoor Outdoor Usage: Indoor
Other Special Features of the Product: Extended Bloom Time
Expected Blooming Period: Summer to Autumn
Material Features: Gluten Free
Color: Black
Style Name: seedling heating mat
Item Weight: 16 ounces
Number of Items: 1
Brand Name: VIVOSUN
UPC: 742920469795
Manufacturer: VIVOSUN
Model Number: VS-330101
Manufacturer Part Number: x000vnd2y3
Manufacturer Warranty Description: 1 Year
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: 10"x20.75"
I have 10 gallon glass tanks set up as terrariums. Since the substrate stays moist at all times, this gently heats the soil slowly. It's just a backup/booster as the house gets cold in the winter. It will not keep the air in the terrarium warm, but it does keep the soil warm. (which is how it's designed - a low and slow heater, which works best on water due to it's high heat capacity) Placed under the tank, with the soil probe set to "70F" it kept a range of 68-72F in the soil even if the room is 60F. My substrate is 4-6 inches deep, well aerated, and kept moist. Surprisingly, it works on tanks that have 4 little feet raising the tank up. (such as the Thrive brand 10 gallon open front vivarium tank) I assumed all the heat would simply rise up, hit the bottom of the tank, and proceed to leak out the sides. Without any significant warmth added to the soil. But it actually warms the soil just fine. Remember that very cold water shouldn't be poured into a glass tank with a heater touching it, because the temperature difference could crack the glass. That being said, these heaters heat very gently, without touching the glass (in my set ups), and I pour room-temperature (60F) water into the tank to water the soil. Pro - if you hang the controller up, you can easily see the current temperature of the soil reported by the soil probe. Downside - it's not quick/easy to change the temperature setting. It is a strange design, where you do NOT press the up or down arrow buttons to adjust the temperature up or down. Instead, you must hold down the setting button for a long time until it blinks. Then press up/down buttons to chose the temperature goal. Then hold down the setting button for a long time until it goes back to showing the current temperature.
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Reviewed in the United States on March 24, 2026 by Pokey
Size: 10"x20.75"
This heating mat is definitely not like most heat mats. I bought me in 2022 for sitting my epoxy on to keep it warm so it produced less bubbles. I would have to say this may here is very useful for many things. The mat is very sturdy, I bought some different mats this year and they are just garbage. The mat is flimsy and wavy, that’s why I just bought another one of these mats. The size of this mat is exceptionally large, it holds all my epoxy bottles and I do have a lot more than 10 and still have room for more. The material is very strong and durable, you don’t have to worry about tearing up this mat because it will outlast the digital thermostat. The heating performance is amazing, the good thing about it is you can control the temperature. One thing I will say be aware that after a few years (or at least mine did) the thermostat started acting finicky it would show the display and sometimes it wouldn’t. It maybe on or may not. I had this mat for a couple of years before it started acting weird so I put it in the trash and didn’t get another one until now. I wish I would have ordered one way sooner, I wouldn’t have been fighting bubbles like I have been in my epoxy. As I said earlier the material is very strong a durable, and you definitely get your moneys worth in this mat. I am very pleased with my purchase I made.
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Reviewed in the United States on April 18, 2026 by Tina Shepard
Size: 10"x20.75"
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.
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Reviewed in the United States on February 27, 2020 by M.L.Champ'e
Size: 3"x20"
This is one of those products that you can set and forget for the most part. It keeps my seedlings nice and cozy though the claimed temp levels of the mat might not be true. I have it currently set to 80 but it seems to be struggling to get past 75. This could be intentional but I do not know. The materials feel good and tough and will hopefully last long. For the warmth it does provide it seems to be working because my seedlings have started sprouting. I still do not understand why buying the mat and temperature gauge separately costs so much b7ut if you buy them together then it is a great value.
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Reviewed in the United States on October 10, 2025 by Ashley Marks
Size: 10"x20.75"
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!
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Reviewed in the United States on January 25, 2026 by Alkaline Guy
Size: 10"x20.75"
Seems like a good quality product, only had it under the seedlings for 2 days and got a bunch to sprout. I only had one before that. The thermostat works great, the temp is off by a half degree but that's not any problem. Great heat mat for the price
Reviewed in the United States on May 16, 2026 by Cadillac man
Size: 10"x20.75"
I'm using it to gently heat my colony of dubia roaches. I haven't been using it for long, but it's working well so far and I believe the roaches are enjoying the warmth. It seems like a good deal considering it comes with a thermostat (very important!)
Reviewed in the United States on July 28, 2026 by Nicole
Size: 20"x20.75"
I am using to manage Sour Dough Starter and Dough Proofing temperature management. The thermostat on this unit is excellent - and since the temperature sensor has a long cable, it can be placed inside the dough/starter to the bottom of the container to prevent overheating. The way it works is the thermostat controller and the heating pad are two separate devices - the pad has a standard 120 Volt plug - it plugs into thermostat controller and teh controller plugs into your wall outlet. It DOES NOT VARY the temperature of the pad - it is either full on or full off - the thermostat probe determines if Pad gets turned on or off. So, you need to place the probe in the correct place to ensure whatever you are heating doesn't get too hot or not hot enough - for Sour Dough put probe at bottom of the vessel or close to the bottom (I use glass jars/bowls) and cover with a cloth towel so it heats as evenly as possible. I also use inexpensive "Aquarium" digital thermometers with long probe cords to check my starter/dough at different depths because depending on ambient room temp and how much it fluctuates during a 24 hour period, you may have to adjust the heating pad thermostat to compensate and you may want to put a folded cotton towel under the jar/vessel so that the heat from the pad is more gradual especially in rooms that go down to low-mid 60's at night while you are trying to maintain 72-75 or higher temperature throughout the starter/dough container - u don't want the bottom to be 80 and the top 72. I learned not to put thermostat too high - if I want 75 degrees and kitchen is 65 I set temp to 70-72 cover with towel and watch the small external aquarium thermometer set in the middle of the dough and the thermostat probe that controls pad at the bottom - leave it for a few hours and check both readings - adjust as needed and use folded towel under jar if you need to raise heater pad temp just to be safe. But.. the heating pad unit probe temp reading matches my very accurate digital professional probe thermometer to 1/10th of a degree so I don't have to worry about "false/inaccurate" control of the heating pad- not bad at all. The Pad itself heats quickly but doesn't get overly hot - you can place your hand on the pad safely under full power - you don't want a pad that gets too hot. I find it raises ambient room temperature about 5-10 degrees without much of a struggle - the larger the temp difference between set temp and item/room temp the longer it will take to get there - low and slow - took about 5-7 hours to raise 1000 grams of covered dough in a glass bowl from 68 to 75 degrees with thermostat about 80% deep in dough towards bottom and temp set for 77 (bottom of dough was 77, top was 75, room temp varied from 64-72 in 24 hour period). The pad stays warmer, longer, closer to the electrical line cord end and cooler on the end furthest from the cord - as thermostat turns pad on and off during a warming cycle, the end closest to the cord warms first and then spreads to all corners but it does take time for that to happen 20-30 minutes for even heating all around.
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Reviewed in the United States on February 21, 2024 by Chris Colt