what temperature is too cold for a marijuana plant
Answered by The Community. Making the world better, one answer at a time. Temperatures below 70 degrees F are too cold for most Cannabis plants. Ideal temperature for daytime should be 70-80 degrees F. Night temperatures should be kept over 60 degrees F to prevent stress, stimulate hormones and reduce stem elongation.nswered by The Community. Making the world better, one answer at a time. Temperatures below 70 degrees F are too cold for most Cannabis plants. Ideal temperature for daytime should be 70-80 degrees F. Night temperatures should be kept over 60 degrees F to prevent stress, stimulate hormones and reduce stem elongation.