Cannabis grows best at 75 to 90 day temps n 55 to 70 night temps air circulation co2 water nutriants n light quan. n qual. all r very important if u want smokible pot
BlackBerry Reviewed by BlackBerry on . COLD WEATHER i used to be one a 24 hour Light then i dropped to 20/4 anyhow, the point is my lights provided around the clock temperature control (it would be too cold where i grow otherwise) I switched to 12/12 a week or so ago and it has been very warm. today it is cold ( the dark period is during daylight hours for heating purposes) the temperature in the grow room has dropped from 75 this morning with the lights on to 50 now with 2 hours left. i think 50 degrees is the bottom end temperature before Rating: 5