If its going to be too wet, you may want to figure out some form of shelter, personally I think the greenhouse will still be too warm for them - these guys love the cold (once they're established!) I have a feeling though that whatever you decide they'll do fine! Even if you have them indoors and they etiolate, when you do put them outside they'll catch up, just slow for a month or so! (I'm the king of touch love! - not really...I have had such a difficult time not "doing" things to these guys! I do take off any brownish looking leaves - very gently! and I check periodically how their root growth is, again totally gently! (probably not something recommended, but I just can't help it! they're so cute and I want to make sure they're doing okay!)