A single eggplant typically yields enough produce for one person, throughout its growing season. Planting eggplant under its ideal conditions and using some gardening tricks may help increase yield, according to the Ohio State University.
The actual number of vegetables produced by a single plant varies depending on the type of eggplant being grown. On average, Italian eggplants produce about eight fruit per plant. Asian eggplant, which is longer and thinner than the Italian variety, grows about 15 fruit per season, according to garden columnist Jim McCausland of Sunset Magazine.
Two main problems contribute to a decline in eggplant yield: lack of water during blooming and soil temperatures below 65 degrees F, according to the Ohio State University Extension.
Researchers at the Ohio State University report the best way to increase eggplant yield is using plastic mulch during planting. Place fertilizer in the soil when planting and then cover with plastic mulch. Mulch is shown to increase yield up to 300 percent.