is it ok to put my plants on a heat mat.....it gets cool here at night....there in a tent but its on a cement floor in garage
 
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is it ok to put my plants on a heat mat.....it gets cool here at night....there in a tent but its on a cement floor in garage
How about 2-4 layers of cardboard to insulate beneath the tent?

A heat mat could be good. But, it's an opportunity for things to go wrong too. (Recently someone cooked their roots doing that, made a mistake.).
 
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