Does anyone know what a good nighttime temp is for a greenhouse full of seedlings? I think I will germinate my seeds in the warmth of the house, and then move the trays out to the greenhouse. I haven't been able to find in any of the books I have read what I should set my nighttime thermostat temp at on the heater. I live in Montana where the nights (even in the summer) can be pretty cold. And I only have one heated mat (I have spent all my $$ on building materials for the greenhouse). Any input or books that are good would be much appreciated!

I kept my seeds at about 50 degrees at night when starting them BUT I germinated them with bottom heat so that the soil was about 75 degrees. Once the flat had mostly sprouted, I moved them away from the heat