The number of fruit produced on one eggplant plant varies widely according to the eggplant variety, soil characteristics, irrigation, sun exposure, and the length of the season. To get a good crop of eggplant, you will probably need to stretch the season with wall'o'waters, floating row covers, hotcaps, etc. Results of an eggplant variety trial in Missouri showed that you could expect about 4 pounds of fruit from one plant, from 7 to 12 fruit per plant. Plant at recommended spacing for best productivity.