Use heat mats (germination mats). Fairly cheap and they will do the job.I have six 5gal fabric pots in my tent, but directly under my tent is concrete. The concrete is rather cold during this time of year. Does anyone have any recommendations about keeping my roots warm?
I did something similar and put 2” foam insulation board on the basement floor then set the tents up on top.I keep a 2in thick piece of insulation on the bottom underneath the insert
yup, exactly that. The white styrofoam boards are cheap and effective. If you get the pot bottoms off the floor of the tent and aerated, that will help even more.I did something similar and put 2” foam insulation board on the basement floor then set the tents up on top.