not sure what type of medium set up you got, but, Just make sure you got the roots zone warm so the heat and humidity rises past the roots and up onward past the soil, so it humidifies the whole plant or plants. That's not even a large difference from each other. I got a 8X8 grow box tent, with plants in soil above the ground not touching the ground though with homemade racks so my plant are off the ground, and a small box heater set on high, running on the ground towards another box fan so it reflect the heat back towards under the pots, and the opposite side of the tent i have a standing circulating fan blowing to stir up the air around them at the tops. I don't use the vent on the bottoms to cold here in Washington at this time of year unless its get super hot outdoors then everything heats up, I have two smaller holes at the top of the grow tent that are open for air exchange. I mean my shit is not super but the fucker is working like a pro.
