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How to Grow Purple Deep Purple

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Purple Deep Purple

Solanum melongena 'Purple Deep Purple'

vegetable

Purple Deep Purple is a popular eggplant variety known for its deep, glossy purple skin and elongated fruit shape. It produces high yields of tender, flavorful eggplants that are excellent for cooking and are a staple in many cuisines worldwide.

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Example Purple Deep Purple timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Purple Deep Purple

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Purple Deep Purple

    Around Jun 26

    ≈ 70 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Purple Deep Purple dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily (8+ hours preferred for best fruit production)
💧
Water: Consistent moisture; water deeply 1-2 inches per week. Keep soil evenly moist but not waterlogged. More frequent watering during hot, dry periods and fruiting stage.
📏
Spacing: 24 inches
📅
Days to maturity: 70-85 days from transplant
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Planting depth: 1/4 inch for seeds; transplants at same depth as container

Soil

Type: Well-draining loamy soil rich in organic matter
pH: 6.0-6.8
Amendments:
compost aged manure peat moss perlite for drainage

Growing Zones

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Thrives in zones 5-10; grow as annual in cooler zones 3-4

3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

1

Seedling

2-3 weeks

Tiny seedlings with 2 cotyledons emerge; first true leaves appear within 1-2 weeks

Keep soil warm (70-80°F), moist but not soggy. Provide bright light 12-16 hours daily. Thin seedlings to strongest plant per cell.

2

Vegetative Growth

4-6 weeks indoors; 2-3 weeks after transplanting outdoors

Plant develops multiple stems and branches with glossy dark green leaves; compact bushy growth

Maintain warm temperatures (70-85°F). Gradually harden off seedlings before transplanting. Pinch off top buds if needed to encourage bushier growth. Transplant outdoors after last frost.

3

Flowering

3-4 weeks

Purple or white flowers appear on branch tips; flowers have yellow stamens and purple calyces

Ensure consistent watering and warmth (minimum 65°F at night). Avoid nitrogen-heavy fertilizers; use balanced or phosphorus-rich fertilizer. Gently shake plants to aid pollination.

4

Fruiting

3-4 weeks

Small green fruits form and gradually enlarge, developing the characteristic glossy deep purple skin color

Maintain consistent moisture and warmth. Apply mulch to regulate soil temperature and moisture. Provide stakes or cages for support as fruits become heavy. Fertilize every 2-3 weeks.

5

Harvest Ready

2-4+ weeks of harvesting

Fruits reach full size (6-8 inches long), have firm glossy deep purple skin, and glossy appearance indicates peak ripeness

Harvest regularly to encourage more fruit production. Wear gloves as plants have small spines on stems and calyces. Continue watering and fertilizing for extended harvest.

Companion Planting

Plan your garden →

Plant with:

basil thyme parsley onion garlic spinach lettuce bean

Avoid planting near:

brassicas (cabbage, broccoli) fennel pepper (overcrowding)

Common Pests

  • Hand-pick beetles and egg clusters daily. Use row covers on young plants. Apply neem oil or spinosad if severe. Introduce beneficial insects.

  • Spray foliage with water to dislodge. Use neem oil or insecticidal soap weekly. Increase humidity. Maintain plant vigor through proper watering.

  • Use row covers on young plants. Apply neem oil or pyrethrin. Keep plants vigorous and well-watered. Remove nearby weeds.

  • Use yellow sticky traps. Spray neem oil or insecticidal soap weekly. Encourage beneficial insects. Remove heavily infested leaves.

  • Plant resistant varieties if available. Practice crop rotation (3-year minimum). Remove infected plants immediately. Sterilize tools between plants.

Uses

🍳

Versatile Cooking Ingredient

Culinary

Purple Deep Purple eggplants are excellent for a wide variety of dishes including ratatouille, baba ganoush, eggplant parmesan, stir-fries, and grilling. The tender flesh has a mild flavor and creamy texture when cooked. [source]

🍳

Roasting and Grilling

Culinary

The firm, elongated shape of Purple Deep Purple makes it ideal for slicing lengthwise and grilling or roasting. The skin becomes tender when cooked and the flesh develops a rich, slightly sweet flavor. [source]

💊

Nutritional Value

Medicinal

Eggplants are rich in antioxidants, particularly nasunin (found in the purple skin), fiber, and vitamins. They contain minimal calories while providing significant nutrients and are beneficial for heart health. [source]

🏠

Natural Dye

Household

The deep purple skin of eggplants can be used to create natural dyes for fabric and other materials, producing various shades of purple and violet depending on mordant used. [source]

🦋

Pollinator Support

Wildlife

Eggplant flowers attract bees, butterflies, and other pollinators. Growing eggplants helps support beneficial insect populations in the garden. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest eggplants when skin is glossy and deep purple, typically 6-8 inches long. Use a sharp knife or pruners to cut 1 inch above the fruit to avoid damaging the plant. Harvest regularly (every 3-4 days when actively producing) to encourage continuous fruiting. Eggplants are best harvested before they become dull or brown, which indicates overripeness.

Fun Facts

  • 🌱 Eggplants are technically berries and are botanically classified as fruits, not vegetables, making them a fascinating example of culinary versus botanical classification.
  • 🌱 The plant name 'eggplant' comes from the shape and color of early cultivars which resembled white or pale yellow eggs on a plant, though Purple Deep Purple varieties are far darker.
  • 🌱 Purple Deep Purple eggplants contain small, edible spines on their stems and calyces (the green parts beneath the fruit), which is why gloves are recommended when handling the plants during pruning and harvest.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Mulch pH Pollination Transplant True Leaves
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