I've been working on a project with my seventh graders, and decided to grow some seedlings out for them ahead of time, In hopes that they could take a near-blooming size DL with them at the end of their DL project. I started these in pots outside last August, then moved them to my garage, and finally to the new greenhouse for the winter. I was a bit anxious to put them in the GH since I've never had one before, and knew next to nothing about what to expect. I used a small space heater to keep the temps above freezing at night: the daytime temps were usually around 90.
Needless to say, the DL loved it, and I plan to use the GH next year for my own seeds. I also sprouted seeds inside the last couple of weeks and have been putting them in the GH as I see green leaves forming.