I potted up my PFT rhizome sale plants (S. leuco., S. purp., S, catsbaei, S. wriglyana) and put them outside on my west facing patio in their "mini greenhouse" the other day. It's about 35-40*F in my area of MN now so I didn't fill the trays with water I'm just letting the soil be wet right now as I've heard waterlogged soil will not allow them to breathe in this cold time of the year.
My question is: is it too cold for them to be outside from now on (It shouldn't get down to freezing anymore this year plus it is a bit warmer in the cold frame since there's no wind factor) and also when is it ok to start watering them normally. So far they look OK but I'm just asking cos I'm new at "spring planting".
Thanks for any thoughts!