Propagation: When to move seedlings out to a cold frame/greenhouse?, 1 by KaylyRed

KaylyRed wrote:
I'm running out of room in my seed starting area. Usually, I keep everything indoors until it's warm enough to harden off, but this year I find myself crunched for space and I'd like to put some things outdoors. Here's my question...

Last year, my husband bought me one of those mini-greenhouse setups with 3 shelves, wrapped in heavy plastic that you unzip to access. My impatiens are impatient--I planted them too early and they're blooming already and need to be moved out of flats and into their own pots. I also have smaller petunias and pansies that should be potted up. How soon is too soon to put these outdoors in the mini-greenhouse? We're getting daytime temps in the 40s now, but at night it's still going down into the 20s occasionally. Next week looks to be warmer, but it's the weather...unpredictable as always.

Thoughts?