VIVOSUN Seedling Heating Pad & Thermostat Controller

Last updated date: September 7, 2021

DWYM Score

9.0

VIVOSUN Seedling Heating Pad & Thermostat Controller

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We looked at the top Seedling Heating Mats and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Seedling Heating Mat you should buy.

Update as September 16, 2021:
Checkout The Best Seedling Heating Mat for a detailed review of all the top seedling heating mats.

Overall Take


In our analysis, the VIVOSUN VIVOSUN Seedling Heating Pad & Thermostat Controller placed 6th when we looked at the top 6 products in the category. For the full ranking, see below.

From The Manufacturer

Reliable Results: VIVOSUN’s professional heat mat maintains sweet-spot temperatures around 68-86℉(20-30℃) – perfect for seedling starting and cutting propagation. Stable, Uniform Heat: VIVOSUN's strengthened heating film ensure this durable mat never scorches your roots and produces plenty of invigorating dew when used in combination with a humidity dome. Professional Reliability: For professional-grade horticultural systems, the controller maintains a stable temperature anywhere between 40-108°F (5-42°C) while the sensor probe delivers accurate readings in every environment. Zero-Effort Setup and Operation: The controller comes with a manual, but you won’t need to read it. Using 3 buttons, you can quickly set the temperature or change the display between Fahrenheit/Celsius. Safety Guaranteed: This 10" x 20.75" mat is slightly larger than comparable competitors and is perfectly sized for standard 1020 trays. The VIVOSUN Heat Mat Combo Set is the best, safest choice for professional heat mat regulation.

An Overview On Seedling Heating Mats

Seed and seedling flats are often placed in windowsills – but that can get to be too hot or too cold; seeds and seedlings require consistently warm temperatures to thrive. Seedling heat mats slowly increase the temperature of seed-starting mediums. This kind of gentle warmth mimics warm springtime outdoor soil temperatures. Although experts disagree about the exact sweet spot temperature, it generally ranges from 65 to 85 degrees. That’s about 10 to 20 above the average temperature in your home.

In essence, seedling mats are electric heating pads made from PVC or plastic that are placed under seedling trays.  They are regulated by thermostats. These mats are made from waterproof materials and contain heating coils inside. All you need to do is place your trays on top of the mat and plug it in – however, you should check on the temperature from time to time. Heat mats are not required for seeds and seedlings to grow, but the added heat can speed up germination!

Look for seedling heating mats that measure around 10 by 20 inches; if you have more trays, you can easily find larger mats. If you are starting from seeds, make sure to read the back of your seed packets to see what their optimum growing temperatures are. You can remove the trays right after they sprout, keeping in mind that even if only some sprout, the others will follow suit soon after. The tray can be removed as soon as the first few seedlings start poking out, as the others have had the benefits of the additional warmth.

The Seedling Heating Mat Buying Guide

  • Do not use a standard heating pad for seed and seedling germination. These do not provide consistent heat.
  • If you want a more inclusive germination system, look for heat mats that include grow kits with humidity domes – these keep your little green babies well-hydrated!
  • If you have a pet, you can put a seedling heating mat under a towel or blanket to warm up their bed. Just be sure to remove the mat once the item is heated up!