Ohuhu Water-Resistant Seedling Warming Mat

Last updated date: September 18, 2021

DWYM Score

9.1

Ohuhu Water-Resistant Seedling Warming Mat

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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 18, 2021:
Checkout The Best Seedling Heating Mat for a detailed review of all the top seedling heating mats.

Overall Take

This heating mat has a unique layered structure, made with PVC and a Nikrothal heating wire. This combination keeps the rooting area temperature optimal and stable for the growth of your fledgling plants.


In our analysis, the Ohuhu Ohuhu Water-Resistant Seedling Warming Mat placed 4th when we looked at the top 6 products in the category. For the full ranking, see below.

From The Manufacturer

Stable Heating System: Designed to increase the temperature of the rooting area 10℉ to 20℉ above the ambient air temperature, perfect for indoor gardening, for better germination and plant growth. 5-Layer Structure: The outer layer of this seedling heat mat is made with heavy duty PVC material, and the middle alloy Nikrothal heating wire is wrapped in dual insulating PET layer which is firm, durable and safe for use. Water-Resistant & Easy To Clean: IP67 water-resistant, proofed against splashes, showers and sprays. Due to the high water-resistant level, it is easy to clean the Ohuhu plant heating pad, just need to rinse and wipe it. Ideal Size: The size of this Ohuhu seedling heat mat is 10''x 20.75'' with 6 ft power cord, suitable for general plant germination and keep a moderate temperature for your plants in cold winter. Carrying Pouch: Comes with a storage bag, just need to roll up the heating pad and put into the handy carrying bag when not in use, convenient for collection.

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. Both 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 Fahrenheit. That’s about 10 to 20 above the average temperature in most homes.

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, as well as before they lay down.