🥕 Eggplant

Solanum melongena

vegetables fruit (culinary vegetable, solanaceae/nightshade)

☀️ Sun

Full sun (8+ hours) CRITICAL; eggplants need MORE heat and sun than tomatoes or peppers — insufficient sun = no fruit set

💧 Water

Medium–high; 1–1.5 inches per week; consistent moisture critical during fruit set and development; inconsistent watering causes blossom end rot (calcium transport issue); drip irrigation ideal; mulch heavily to retain moisture and warmth

🗺️ Zones

4, 5, 6, 7, 8, 9, 10, 11

🪴 Soil Type

Rich, well-drained, sandy loam with very high organic matter; eggplants are HEAVY feeders — incorporate 3–4 inches of compost and well-rotted manure; benefits from calcium (prevent blossom end rot) and potassium (fruit development)

🧪 Soil pH

5.5–7.0 (tolerates slightly more acidic soil than tomatoes/peppers)

💧 Drainage

Well-drained essential; eggplants are very sensitive to waterlogged soil — root rot and verticillium wilt are common in wet conditions; raised beds ideal

📏 Spacing

18–24 inches apart; rows 30–36 inches; compact/patio varieties: 12–18 inches; large Italian varieties need full spacing for good air circulation

📅 Days to Maturity

60-80 days (from transplant); 100-130 days from seed

🍴 Edible Parts

🍽️ ["Fruit (botanically a berry \u2014 the main crop; NEVER eat raw \u2014 contains solanine🍽️ though much less than green potatoes)"🍽️ "Leaves (NOT edible \u2014 toxic solanine content)"]

🤝 Companions (7)

🤝 Bush bean

Beans fix nitrogen to feed heavy-feeding eggplants; beans repel Colorado potato beetles which also attack eggplant; different root depths

🤝 Marigold (French)

Repels nematodes (eggplant is highly susceptible to root-knot nematodes); deters flea beetles and aphids; one of the most important eggplant companions

🤝 Oregano/Thyme

Aromatic oils repel flea beetles (eggplant's #1 pest), aphids, and spider mites; ground cover retains moisture

🤝 Basil

Repels whiteflies, aphids, and spider mites; improves eggplant flavor (anecdotal); attracts pollinators

🤝 Nasturtium

Trap crop for aphids and flea beetles; ground cover retains soil moisture; repels whiteflies

🤝 Pepper

Both are nightshades with identical growing requirements; peppers are more compact, eggplants can be trellised above; efficient space use

🤝 Amaranth

Shades soil keeping eggplant roots cool; attracts beneficial predatory insects; different nutrient demands

⚠️ Keep Apart (4)

⚠️ Fennel

Allelopathic — strongly inhibits eggplant growth

⚠️ Potato

Both Solanaceae — share Colorado potato beetle, flea beetles, early blight, and verticillium wilt; planting together concentrates pest and disease problems

⚠️ Tomato (close proximity)

Same family — shared pests (flea beetles, hornworms, blight); eggplants may compete with tomatoes for calcium; many sources recommend separating nightshades

⚠️ Corn

Both are heavy feeders competing intensely for nitrogen; corn may shade eggplant reducing fruit set

💊 Medicinal Uses

["Contains nasunin \u2014 a potent anthocyanin antioxidant found in purple eggplant skin; protects cell membranes from lipid peroxidation (brain health)", "Excellent source of dietary fiber \u2014 supports digestive health and cholesterol reduction", "Contains chlorogenic acid \u2014 antioxidant with antimicrobial, anti-inflammatory, and blood-sugar-lowering properties", "Good source of B vitamins (especially B1/B6), copper, and manganese", "Traditional medicine: used topically for skin inflammation; juice for lowering cholesterol (folk use)"]

📝 Notes

Eggplants are the MOST cold-sensitive nightshade — require soil temperatures above 65°F and air temperatures consistently above 70°F. Transplant only when nights are reliably above 55°F. Flea beetles are the #1 pest — they can kill young seedlings; floating row covers until flowering, then remove for pollination. Staking/caging prevents heavy fruit from breaking branches. Harvest when skin is glossy — dull skin means overripe and may be bitter; press gently — if flesh springs back, it's ready. Salting sliced eggplant before cooking draws out bitterness and prevents oil absorption. Modern varieties ('Italian', 'Japanese/Chinese' long types) are less bitter than older large globe types. Prune suckers for larger fruit, or leave unpruned for higher yield of smaller fruit.