How cold is too cold?

[millertm]

50's are not too bad, it's to cold in low 40's for a while. Purpleing should only happen in mature late stage flower unless it's a purple strain. Cheers

 

[Edzzed]

My grow started in a room where night time temps dropped to 45 and how I did it was to put a small ceramic heater in there. It was powered by a growneer temperature sensor. Temps went down to 70 and it would run the heater till the temps got to 78 and shut off and repeat. Not necessarily ideal but it did the job and I am quite pleased with how the grow is presently proceeding.