Hello, I was thinking to try an experiment during autumn. I have a nice big greenhouse and I am planning to grow some plants during autumn. My idea is to germinate and leave my plants in a growroom with 600 w HPS for the first month and then move them in the greenhouse to flower. Do you think is it possible to be done? Do I need something to heat the greenhouse?
I live near french/swiss alps and temperature these days varies from 55 to 68 °F.