Soil temperature

Want to grow Nov thru Jan.Have a small grow room 2x2x4 in our closet.Was going to purchase a vivosun heat mat to keep soil warm because closet will be cool.What is the best soil temp? I use 2 gallon vivo cloth pots to keep the plants a little smaller due to space.Is this all possible?

I used a heating mat to start my last grow. I had the soil about 70-75 degrees and it did fine. I keep a thermometer in the soil to check on it during the colder weather.
Here’s some info I found on line;

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The heating mats have been Very beneficial when cloning plants and or popping new seeds for germination

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