How to Grow Eggplant

How to plant and grow eggplant

1. 1

   Plan the rotation before you pick a spot

   Verticillium wilt is the most common eggplant disease, its a soilborne fungus with no cure once established in the bed. The only reliable management is crop rotation: do not plant eggplant, tomatoes, peppers, or potatoes in the same bed for 3–4 years. Plan the rotation before you pick a planting spot, not after.

2. 2

   Choose a spot with full sun

   At least 6 hours of sun

   Choose a spot with at least 6 hours of direct sun per day. Eggplant produces little fruit in partial shade, even when every other condition is right.

3. 3

   Start seeds indoors

   8 weeks before last frost

   Sow indoors 8 weeks before your last frost date, 1/4 inch deep. Keep the germination medium at 70°F as eggplant germinates poorly in cool soil, even indoors. See the starting seeds indoors guide for setup and timing.

4. 4

   Wait for warm nights and soil

   Nights reliably above 50°F

   Wait until nighttime lows are reliably above 50°F and the soil has genuinely warmed, usually 3 weeks after last frost. Space transplants 18 inches apart within rows, with 30 inches between rows.

   If plants have already set flower buds, pinch them at transplant time: directing energy to root and stem growth first produces a stronger plant before fruiting begins. See transplanting seedlings for hardening-off and transplant mechanics.

   When you add eggplant to your garden in Arbor, it queues a mulch task early in the season; dark mulch warms soil in cooler climates and retains moisture in all of them, which matters more for eggplant than for most other vegetables.

5. 5

   Fertilize at transplant, then switch at fruit set

   High-potassium at fruit set

   Work a balanced fertilizer such as 10-10-10 into the top 3–4 inches of soil at transplant. Once fruit begins to set, switch to a high-potassium fertilizer such as 5-10-10 and side-dress at the rate on the label. Too much nitrogen at fruiting drives leafy growth at the expense of fruit.

6. 6

   Water at the base on a steady schedule

   Every 3 days

   Water at the base of the plant every 3 days during active growth. When daytime temperatures stay above 90°F, increase to every 1–2 days. Consistent soil moisture matters more for eggplant than for most vegetables as steady watering is what keeps the fruit from turning bitter.

7. 7

   Cover young plants against flea beetles

   Row covers at transplant

   Flea beetles are the number-one threat to young eggplant. Small, fast-jumping beetles riddle leaves with tiny round holes and can kill seedlings outright. Apply row covers at transplant and keep them on until plants reach about 12 inches tall with 6 or more true leaves (at that size, feeding damage rarely kills the plant).

   Once flowers appear, remove covers during warm parts of the day so pollinators can reach the blooms. The flea beetle guide covers identification and management steps.

8. 8

   Pick before the skin goes dull

   Check every 7 days

   Pick when the skin is still glossy. Dull or bronze-tinged skin means the fruit is overripe, and overripe eggplant is bitter and seedy. Standard varieties are ready at 6–8 inches; Japanese and Italian types at 5–6 inches.

   Harvesting early — at 3–5 inches — improves flavor and keeps the plant producing. Check every 7 days during the harvest window and pick promptly: eggplant won’t drop fruit on its own, so anything left too long will sit and overripen.