Keep in mind when planting that Thai purple egg is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.
Optimum soil germination temperature for eggplant seeds is 86° F
By our calculations, you should look at sowing Thai purple egg about 70 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Thai purple egg is a tender plant.