Yeah, try to keep night temps above 65 if you can. I know you outdoor people don't usually have a dedicated indoor grow area that's ideal, but preventing drafts is a good place to start- I assume most outdoor growers are sticking stuff for spring in your unheated 3-season porches, sunrooms, basements, that guest room that's too cold to use, the garage... lol! Any little bit of insulation can help a lot. If it's a corner of the basement, consider hanging plastic sheeting to trap more of the ballast heat.
stinkyattic Reviewed by stinkyattic on . Too Cold? I've had experience where temps below 70ºF slow growth a lot. My temps were as low as 70 during the lights on time but I was able to increase this by slowing down the fan and moving the lighting transformer close to the plants. But I'm sure the night temps must be 60 or lower. What is the acceptable temperature range for growing herb indoors? Thanks, Shovelhandle Rating: 5