Robertsanswered grow question 2 years ago The low temp will slow your growth. The plant needs the warmth to function properly. Plus anything lower then 65F will be too cold. Especially if roots get that cold. Plant will turn purple and start dying. Humidity is best from 40 to 60. 40 flowering, 60 vegging. Lower then 30 the plant can not absorb enough water. Above 60 your chances of mildew, fungus, and rot increase 10 fold. This is the reality of it. Good luck.