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Availability:
In Stock.
Arrives
Monday, Nov 2
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At a glance
- Condition
- New
- Size
- 48"x20.75"
- Model
- VS-330103
- Color
- Black
- Indoor/Outdoor Usage
- Indoor
- Material Feature
- Heat Mat
- Sunlight Exposure
- Full Sun
Features 5
- 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 105 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 seeding 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
Specs 19
| Indoor/Outdoor Usage | Indoor |
|---|---|
| Brand | VIVOSUN |
| Material Feature | Heat Mat |
| Color | Black |
| Expected Blooming Period | Summer |
| Sunlight Exposure | Full Sun |
| Unit Count | 1 Count |
| Product Care Instructions | water |
| Moisture Needs | Moderate Watering |
| Number of Pieces | 4 |
| Indoor Outdoor Usage | Indoor |
| Material Features | Heat Mat |
| Brand Name | VIVOSUN |
| UPC | 615435161525 |
| Manufacturer | VIVOSUN |
| Model Number | VS-330103 |
| Manufacturer Part Number | 43235-189452 |
| Plant or Animal Product Type | Herb |
| Manufacturer Warranty Description | 1 Year |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 2
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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Top Amazon Reviews
Well worth the money
Size: 10"x20.75"
If you love your plants, this is a perfect warmer, but I’m gonna use it only one crab I have a lot I love to bag it came in the size of it easy to use an assemble great idea for a gift to anyone for house plants to keep them warm in the winter if you love them so much like I do Very sturdy the bag came in. Oh my goodness it was so cute. Size was perfect material. Wow I love it. I love the color green but this starting you wouldn’t believe very well. I’ll do a gift for anyone’s home. Well worth the money grab my last recommended. thank you very much. I can’t wait to warm them up adhesions material. Wait to you see it. Awesome is great material you’re gonna love it actually very nice and smooth sturdiness very ideal as a gift for Christmas birthdays grab my last.
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Reviewed in the United States on October 4, 2026 by Denise w.
Using for sour dough temperature management VERY ACCURATE Thermostat
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
Terrarium Tank Warmer (10 gallon glass tank)
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
Works best indoors
Size: 10"x20.75"
When I received the Vivosun heating mat, I initially set it up in my kitchen and set a small container of pepper seeds on it. I set the thermostat to 80 degrees Fahrenheit, which is a good temperature for germinating pepper seeds. The thermostat did a fine job of keeping the soil temperature to the set temperature. I have no complaints with the Vivosun mat and thermostat. Other purchasers complained that the mat did not lay flat, but I did not have that problem. Next I set up a little propagation station on my patio. I set a Jiffy tray on top of the soil heating mat, and put my planted peat pots in the tray. Once again, I set the thermostat to 80 degrees. Initially I left the tray uncovered. I discovered that without a cover the soil temperature in the tray was virtually the same as the ambient temperature of 60 degrees. I put the plastic cover on the seedling tray, and the soil temperature rose to about 78 degrees. Without the cover, it seems that the heat from the mat just radiated out into space. With the cover on, the unit was not able to achieve a temperature of 80 degrees unless the ambient temperature was about 65 degrees or higher. The mat is low wattage which means that it can only produce so much heat. It is not designed to be used in the way that I am using it, so I cannot fault the product. When used outside, it does provide some benefit by raising the soil temperature by maybe 10 or 15 degrees. Where I live, this can be enough to prevent plants from freezing on a cold night. However, for the purpose of germinating seeds, the Vivosun really needs to be used indoors where the ambient temperature is not less than, say, 65 degrees. Unfortunately, I do not have the space in my small house. I should mention that my pepper seeds are sprouting nicely even if the soil temperature is a bit less than optimum. I will probably look around to see if there is a soil heating mat with a higher wattage. I saw an ad for one from a hydroponics company that appears to be aimed at cannabis growers. Of course that unit is much more expensive than the Vivosun....
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Reviewed in the United States on March 16, 2021 by Randy Lent
Good So Far
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
Some issues at first but it’s been corrected.
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
Awesome heat mat!
Size: 10"x20.75"
I love this heat mat. I use it for kombucha brewing. After researching several similar products designed for kombucha, one of the reviews led me to these mats. I was honestly not expecting this quality at this price point. Very sturdy construction. Holds temperatures very well and temp probe is dead accurate. I keep my house around 67 F all year round and it was not an ideal temp to brew kombucha in. After I installed the mat my SCOBY is thriving and my flavors are much better. It stays a consistent 77-79 F. The controller is very easy to use and seems to be well constructed. Will upgrade to the double version when I get another brew vessel. I can't recommend this product enough.
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Reviewed in the United States on March 7, 2026 by db336
Works as advertised for seedlings—just group your trays by target temp
Size: 48"x20.75"
Reading through the reviews, half the people buying these seem to be using them for kombucha, sourdough starters, or reptiles. I actually use mine for seed starting, and having direct temperature control makes an enormous difference in germination rates. Most indoor germination failures come down to cold soil, and pairing the mat with a thermostat makes it simple. I checked the temperature probe with a separate thermometer when I first set it up, and it was dead accurate. More importantly, my seeds pop days earlier and come up far more evenly than they ever did unheated. One practical tip if you buy this large 48x20 size: it fits four standard 1020 trays, but remember that the probe only reads one spot. Make sure everything on the mat needs the same general soil temperature, or you're better off running a couple of smaller mats on separate or no controllers. The mat handles water spills with no problems, and I've run multiple Vivosun mats continuously for seasons without any safety scares or burned-out elements. If you start a lot of seeds indoors (or are thinking of trying it), this saves a ton of wasted seed and hassle.
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Reviewed in the United States on October 4, 2026 by Constance T.