We had the temp set at 50. Heaters didn't have to go on often maybe a little bit at night. The GH was definitely warmer than outside but it was really late spring before I started them so some went into pots out side a week or two after I planted the ones in the GH. I expected them to be much bigger than the ones started later and set outside. There isn't much difference between the two of them. I think bottom heat would have been what they needed to get started.
