





Real discussions from product enthusiasts
Mat Can Reach 40°C; Thermostat Crucial for Control
Users on r/HotPeppers noted the VIVOSUN mat can reach 40°C (104°F) in spots. They advise elevating trays and emphasize that a thermostat is essential for regulating temperature, as the mat itself does not monitor soil or liquid temperature.
Popular Choice for Seed Germination Success
In r/vegetablegardening, the VIVOSUN mat is a popular recommendation for germinating seeds like tomatoes. Users reported success when using it with a thermostat, accelerating germination rates.
Effective for Kombucha Brewing Temperatures
The VIVOSUN 3x20 mat is a favored, affordable alternative for kombucha brewers on r/Kombucha. Users successfully use it to maintain fermentation temperatures between 75-80°F, especially in cooler environments.
Mixed Feedback on Thermostat Accuracy
Some users on r/houseplants reported dissatisfaction with the accuracy of VIVOSUN heat mats, particularly concerning associated thermostats. While the mat itself is considered functional, precise temperature control with certain bundled thermostats was questioned.
Expert answers based on real user experience
The VIVOSUN 3x20 mat provides far-infrared heating, capable of reaching up to 40°C (104°F) at ambient temperatures of 20-25°C (68-77°F). However, it operates as a 'dumb' heating element without built-in regulation. Users in communities like r/HotPeppers and r/Kombucha confirm that for precise temperature control within the optimal 20-30°C (68-86°F) range for germination or fermentation, pairing it with an external thermostat controller is key. This prevents overheating and ensures consistent warmth critical for root development and microbial activity.
r/HotPeppers, r/Kombucha
Users frequently employ the VIVOSUN 3x20 mat for seed germination and plant propagation, reporting accelerated growth rates as seen in r/vegetablegardening discussions. It's also a popular choice for homebrewing and kombucha fermentation, maintaining stable temperatures between 75-80°F, as noted on r/Kombucha. Its 6.5 Watt power draw makes it an energy-efficient solution for creating optimal microclimates in terrariums or stabilizing temperatures in grow tents during colder periods, as discussed on r/microgrowery.
Without an external thermostat, the VIVOSUN 3x20 mat's ability to maintain its optimal operating range of 20-30°C (68-86°F) significantly diminishes in ambient temperatures below 10°C (50°F). While it can reach a maximum of 40°C (104°F) under ideal 20-25°C (68-77°F) conditions, its 6.5 Watt power draw means it will struggle to counteract substantial heat loss. Relying solely on the mat in colder environments risks insufficient warmth for germination or fermentation, making a thermostat crucial for consistent results.
The VIVOSUN 3x20 mat itself is a passive heating element, and user experiences with temperature accuracy can vary. Some users report achieving stable temperatures within 1-2°F of their set point (e.g., 77°F achieved with a 80°F setting) when paired with a quality external thermostat. However, other reports, particularly from r/houseplants, indicate potential inaccuracies. For reliable temperature control, it is advisable to use a thermostat probe placed directly within the growing medium or brew, rather than relying solely on ambient air temperature readings.
VIVOSUN
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Key features: Reliable Results: The VIVOSUN professional heat mat maintains optimal temperatures around 68-86℉ (20-30℃), 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, Multiple Uses: This 3" x 20" heating pad with a 5.9ft power cord is suitable for glass fermentation jar; It also runs on only 6.5 Watts to help you save on electricity; 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 ℃(104℉)at an ambient temperature of 20-25 ℃(68-77℉)in minutes; We recommend using it with the thermostat controller and humidity dome. Built with Material: Other, Material Type: Other, Item Weight: 0.1 Kilograms.
| UPC | 615435161501 |
| ASIN | B073PTZCJ4 |
| GTIN | 615435161501 |
| Brand | VIVOSUN |
| Shape | Rectangular |
| Colour | Black |
| Pattern | Solid |
| Material | Other |
| Brand Name | VIVOSUN |
| Unit Count | 1 Count |
| Unit count | 1 Count |
| Item Weight | 0.1 Kilograms |
| Closure Type | Cork |
| Manufacturer | VIVOSUN |
| Package type | sturdy cardboard boxes |
| Material Type | Other |
| Number of Items | 1 |

VIVOSUN
VIVOSUN 10"x20.75" Seedling Heat Mat and Digital Thermostat Combo Set

VIVOSUN
VIVOSUN 5-Pack 20 Gallons Grow Bags Heavy Duty Thickened Nonwoven Fabric Pots with Handles

VIVOSUN
VIVOSUN 5-Pack 10 Gallon Grow Bags Heavy Duty 300G Thickened Nonwoven Plant Fabric Pots with Handles

VIVOSUN
VIVOSUN 5-Pack 15 Gallon Grow Bags Heavy Duty 300G Thickened Nonwoven Plant Fabric Pots with Handles
r/vegetablegardening, r/Kombucha, r/microgrowery
The VIVOSUN 3x20 mat is constructed from durable PVC material with double insulation layers, designed to meet stringent MET standards. Its IP67 waterproof surface allows for easy cleaning with safe scrubbing, making it suitable for damp environments like propagation stations or brewing areas. Users in forums like r/gardening often praise its longevity, with many reporting it lasts multiple years. The mat is also flexible and can be rolled up into an included carrying bag for convenient storage and transport.
r/gardening
r/houseplants
| Customer Reviews | 4.5 4.5 out of 5 stars (26,408) 4.5 out of 5 stars |
| Best Sellers Rank | #41 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #11 in Greenhouses & Plant Germination Equipment |
| Place of Business | Redding, CA 96001, US |
| Is dishwasher safe | No |
| Product Dimensions | 7.6W x 50.8H Centimetres |
| Date First Available | Sept. 26 2018 |
| Customer Package Type | sturdy cardboard boxes |
| Item Dimensions W x H | 7.6W x 50.8H Centimetres |
| Is the item dishwasher safe? | No |
| Recommended Uses For Product | plant sprouting, home brewing, terrarium warming |
| Recommended uses for product | plant sprouting, home brewing, terrarium warming |
| Is discontinued by manufacturer | No |
| Manufacturer Contact Information | Redding, CA 96001, US |