I have such a small lighted area indoors that I need to move the first 4 trays SOMEWHERE after 2-3 weeks, so I can start 4 more trays.
I've been thinking about a low hoop tunnel / cold frame for seedling trays and 3" pots so they don't get too cold at night, yet hopefully won't cook at Noon. I suppose that makes hardening off a two-step process. Once when they go into the cold frame, and again when they come out.
We have a very long, variable spring. I think that just a little protection might add 6-8 weeks to the seed-starting season. "Average last frost" is April 8, but cold, cool and warm alternate from January through May.
