Moving to unheated greenhouse
I have added water for passive heat to my unheated greenhouse. Its the third day and the low was 2.5C (-3C outside). The other days the lows were -1 and -0.3C (outside -8C). I have mini roses I bought and potted up after Valentines Day. I dealt with one bout of mildew and bugs and think it is only a matter of time before I have more problems. I would like to get them out of the house and into the greenhouse. Is it too cold (lows about freezing)?