Because of our 10 day "Spring Break" - temps in the mid to upper 70's even hitting 80 two days, my winter sown Primula x elatior - Victorian Lace has germinated. They are hardy to zone 4. It's going to get into the upper 20's tonight for about 2 hours .. I'm wondering if I should leave them outside or bring them into a cold utility room for the night .. I'm not sure the hardiness pertains to newly germinated seedlings .. can anyone give me some advice as to what to do? In or out?

This happened to me last year!! My seedlings froze when the temps dropped down into the 20's. Very few survived. To keep them from freezing you will have to bring them inside somewhere.

Thanks! I'll stick them in the unheated utility room .. never gets below 40 in there but stays in the low 50's.

Perfect, sounds like my garage!
Last year I had put mine out side to wintersow at the end of December, but it is too warm here to do that. I decided to put them out at the end of January this year so they will not sprout before the freezing temps get here.

Our Mid-Winter "Spring Break" has wreaked havoc for me! We usually do have a slight warmup in January but this was extraordinary to say the least .. from my point of view I loved every second of it .. from the garden's point of view it was a disaster .. everything in the greenhouse got a 5 degree soil temp increase which started plants growing. I have about 15 rooted cuttings of passiflora which are now actively growing and shooting out tendrils trying to grab on to everything .. it's a nightmare. In my Woodlands Garden the Mouse Plant, Arisarum proboscideum has popped up and the ground orchids, Bletilla are popping up all over .. I probably should be outside covering things with buckets.

Even the tree's around town are starting to get fuzzy looking indicating leaf buds are swelling and azalea buds are swelling as well. Probably going to be a really sad Spring.

That's the same thing that happened to us last year and my ground orchid died. Oh I have a picture of something that will help keep the plants warm like a little greenhouse. Don't remember where I got the picture but it is not mine. Seems like you could make the opening a little smaller right?