Of all the summer crops, with the possible exception of okra, eggplant is the most finicky when
it comes to temperature. The plants simply refuse to tolerate cool weather. Plants set out too
early grow slowly, can be stunted, and usually produce smaller yields. If you really want
eggplant to thrive, don't be in a hurry to get them in the ground. Wait until about a month
after your last spring frost, preferably until overnight temperatures stay in the 60s.
Generally, the later you wait the better the production.