I’m trying to take plants through the winter just outside of KC for the first time in a heated greenhouse. I’m going to start tomatoes etc. earlier this year. When would be a good time to start. Also please add me to your ping list.
I do plant cold hardy varieties of lettuce, spinach and carrots for example, and cover them with row covers, straw etc as needed in the fall, and they usually give us some eating in the winter and all spring till mid June.
This winter has been so cold, that I am not sure I'll have anything that survives, but we'll see.
You can start your tomato seeds any time you want, but the limiting factor will be what stage of growth you want them to be at when you transplant them, and what kind of weather we have this spring.
Tomatoes won't do anything toward growth under 50 degrees IIRC, and they do better in warmer weather than that. We usually start our tomato seedlings about 4 to 6 weeks prior to desired outdoor transplant date. We start them indoors in front of our SW facing windows.
I have successfully taken indeterminate tomato plants indoors in the fall, and grown them through the winter. They have flowered indoors, and I pollinated them by hand either by flipping them as I passed by, or using a kid's paint brush.
So your heated green house should provide a lot of time for growing all sorts of veggies. Peppers are particularly good for growing indoors.
I will add you to the list.