Early warm weather in northern Indiana brought fruit buds and blossoms out early in the season followed by two hard freezes. This set all fruit crops back for a poor season this year. Even potatoes got hit but seem to be coming back.
Cool weather crops like turnips, spinach, peas and lettuce seem to be doing well.
The last frost date is probably about May 15 but we're having one week of warm weather with nite time temperatures above 50 degrees so tomato plants could be put in now as long as you're prepared to cover them with buckets just in case. Shortly after that, peppers can be put in.