I'm zone 6b, The only things I have in the ground are some snow peas, spinach, and broccoli which I won't plant again this year (maybe spinach in fall if there is room)
and the following that I will plant more of as the year goes on, onion sets, lettuce, radish.
I do plan on buying already started plants from the greenhouse of tomatoes, peppers and eggplant (not necessarily because of season length but because the ones I buy actually produce whereas the ones I've always started don't produce well)
Will buy more plants from the greenhouse too, but that's only because i can't restrain myself!