Just planted my tomatoe and pepper plants in a large planter and big pots yesterday. Will keep an eye on the weather forcast and cover them if the temps get to cold. I usually wait until Memorial Day, but got spring fever this year they won't be hard to cover if needed. The plants have been outdoors except for one night since I bought them around the first of May.
I have all my annuals and will likely plant them next week or if the temps are to cold I can always put them in the garage at night.