Eggplant

Growing Conditions

Eggplant is the most heat-demanding of the common nightshades. It requires soil temperatures above 60°F (ideally 70°F+) to grow well. Cold soil causes purple discoloration of leaves and stunted, sulking plants that never recover. Full sun and warm temperatures throughout the season are non-negotiable.

Cold climates: Start indoors 8–10 weeks before last frost. Don’t transplant until soil has thoroughly warmed — late May or early June in Zone 5. Black plastic mulch helps warm soil and maintain heat. Choose shorter-season varieties.

Warm climates: Eggplant thrives. Plant out after last frost and enjoy a long productive season.

Sowing & Planting

Start seeds indoors at 80°F–85°F soil temperature — eggplant needs warmth to germinate reliably. Transplant at 6–8 weeks old, spacing 18–24 inches apart. Harden off thoroughly before planting out. Water in well with warm water.

Care & Maintenance

Water consistently — 1–1.5 inches per week. Mulch to maintain soil warmth and moisture. Feed with balanced fertilizer at planting and again when flowering begins. Stake tall varieties to prevent wind damage. Pinch off the first flower bud on transplants to encourage the plant to establish before fruiting.

Common Problems

Flea beetles riddled seedlings with tiny holes — use row cover on young transplants. Colorado potato beetle affects eggplant as it does potatoes — hand-pick or use Bt. Spider mites in hot, dry conditions — keep plants well-watered and use insecticidal soap if severe. Poor fruit set in cool weather — wait for genuine warmth before transplanting.

Harvest

Harvest eggplant when skin is glossy and fruit gives slightly to pressure. Cut with pruning shears, leaving a short stem. Overripe eggplant loses its glossy skin, becomes dull, and develops seeds and bitterness. Harvest regularly to keep plants producing — like peppers, eggplant produces more when harvested consistently.

Varieties

Classic Italian types (Black Beauty, Vittoria) produce large, oval, deep purple fruit. Japanese/Asian types (Ichiban, Orient Express) are long, slender, and more tender with fewer seeds — excellent for quick cooking. White eggplant (Casper, White Star) has a creamier, milder flavor. Fairy Tale is a small, productive variety with striped purple-and-white fruit. For short-season climates, Japanese types and Fairy Tale mature earlier than large Italian types.