I'm in East Tennessee where January could bring balmy 60s and March can bring 23" of snow. So I figure to give this more of a chance of success, I'll stagger my sowing, January 1st, February 1st, and March 1st.
I've got a bale of ProMix and my plan is to sew directly into 2.5-qt plastic pots, filled 3/4 of the way to the top with "soil". I don't plan on greenhousing each pot or any of the pots... winter doesn't do that. But if I panic and decide to later, I've got room above the soil to put plastic over each pot.
I'll put one kind of seed per pot, 1/3 of total of that kind of seeds/pot.
I'll have pots in three different locations because I'm not sure which will be best here -- the south side deck, under pine trees or, in direct sun... figuring, SOMETHING should live with the various locations...
With three locations and three "sowings" this could possibly give me 9 pots of each kind of plant... cool.