Solanum melongena L.

Quick Facts

  • Plant family: Solanaceae (Nightshades)
  • Season: Warm
  • Life Cycle: Annual
  • Seed to first harvest: 90-115 days


Figure 1. Eggplant belongs to the Solanaceae plant family.

The eggplant is a member of the Solanaceae family, also known as the nightshade family, which includes crops such as the Irish potato, tomato, tomatillo, and pepper (see Figure 1).

Eggplant is thought to have originated in Asia (mainly parts of India and Burma/Myanmar). The first record of this vegetable is from a 5th-century Chinese book. The original eggplant was a wild plant with orange, pea-sized, spiny fruit (see Figure 2) — very different from present-day eggplant!

Figure 2. The original eggplant produced very small and spiny fruit.

Using newly established trade routes, the Arabs and Persians likely brought the eggplant to Africa around the 8th century, and then the Moors to Spain around the 12th century. It was a common vegetable in northern Europe by the 16th century. When Spaniards colonized the New World, eggplant was transported along with many new crops. Eggplant was documented in Brazil by 1650. By the 1800s, ornamental eggplant varieties were grown in the U.S., introduced by Thomas Jefferson. It wasn’t until the 1900s that other varieties were grown for consumption. See Figure 3.

Another name for an eggplant is aubergine (preferred in the U.K., Ireland, and France) or brinjal (preferred in South Asia and Africa). Eggplant was once called the “mad apple” and considered to cause insanity, and was also known as the “apple of love” since it was believed to have the properties of a love potion. Today, eggplant is most popular in Asia where leading producers include China and India.

Figure 3. Map showing the origin and migration of eggplant to the U.S.

Eggplant are annuals (with a life cycle of one year) that require a long, warm growing season. Very tolerant of hot weather, many eggplant varieties are highly suitable to the Louisiana climate.


Figure 4. The main types of eggplant are Italian, Asian, and specialty.

Eggplant can be grouped into three main types: (1) Asian, (2) Italian, and (3) miniature or specialty (see Figure 4). These types vary in shape, size, and mature fruit color (such as purple, white, orange, red, or green). Asian varieties generally produce elongated, purple-hued fruit, and also include smaller, round varieties ranging in color from purple and green to white. Italian varieties are the more traditional eggplant, producing medium-sized and oval fruit in various shades of purple. Miniature or specialty eggplant varieties are smaller in size and are often very attractive and superior in taste. Some Asian varieties can also be grown as miniature eggplants.

Eggplants have either open-pollinated (including heirloom) or hyrbid varieties. Some eggplants are heirloom varieties, like Rosa Bianca, meaning the seeds have been saved for at least 50 years, can be saved each season and replanted, and are open-pollinated.

Eggplants produce perfect flowers (both male and female parts in each flower), which may be cross-pollinated, but open-pollinated is more common. Flowers generally remain open for 2 or 3 days and are most receptive to pollination in the morning. The extent of natural crossing depends upon insect activity. If seed saving, different varieties should be separated by a distance of 300-1,600 feet to avoid cross-pollination. Generally, it is not recommended to save seed for future planting with hybrid varieties, as they are usually not expressed properly in the next generation.

See the recommended eggplant varieties for Louisiana in Table 1.

Table 1. Recommended Eggplant Varieties for Louisiana

When and How to Plant

Eggplant seeds should be started inside 8-10 weeks before the desired transplanting dates (see the Eggplant Planting Guide, Table 2). Seeds will germinate best in warm soil temperatures (75-90 degrees F) and will take longer to germinate in cooler soil (keep above 60 degrees F). Using seed germination trays (with at least 1.5-inch diameter cells), plant one seed per cell at a shallow depth, about 1/8-1/4 inch deep, just deep enough to be covered with a thin layer of soilless potting mix. Make sure to keep the seed trays in a well-lit area above 70 degrees F. Keep soil moist, which usually requires daily light watering. A seedling heat mat and plastic dome lid are helpful in maintaining ideal germination conditions.

A few days before transplanting outside, it is recommended to follow a hardening-off process to transition seedlings to outdoor conditions. Eggplant easily survives transplanting, but seedlings are susceptible to cold-shock and growth may be stunted if soil and air temperatures are too low. Aim to transplant outside 1-2 weeks after the last frost date and when the daytime/nighttime temperatures are around 70-85 degrees F during the day and 65 degrees F at night (there should be no danger of frost). Transplants should be 6-8 inches tall. Refer to the Eggplant Planting Guide (Table 2) for the recommended spacing when transplanting. The expected growing season for eggplant is 2-3 months (this is how long they will continue to bear fruit).


Category Transplant Outside Dates Spacing (inches) Days to Harvest*
Plants Rows  
Eggplant North LA: April 1-May 15; Aug
South LA: March 15-May 15; Aug-Sept
18-36" (closer for miniature) 30-36” 90-115 days
(70-90 days)

*First range of days: seed to first harvest; second range of days in parentheses: transplant to first harvest
Note: Table adapted from LSU AgCenter and UF Extension Planting Guides, and Southeastern U.S. Vegetable Production Handbook

Where to Plant

Since eggplant is a warm season crop, it requires warm soil and full sun (at least 6 hours/day). Eggplant prefers well-drained, sandy loam soil with a pH between 6.0 and 6.8. It is recommended to plant eggplant in box beds or in traditional raised garden rows that are about 12 inches tall to ensure good drainage. In all types of gardens, it is recommended to add a layer of compost, peat moss, rotted hay, or other organic matter and mix into the soil to optimize plant health.

Reflective plastic mulch — or a plastic fabric/film — is recommended to deter aphids that transmit viruses, as well as to increase soil temperature and control weeds. Drip irrigation is also recommended when using plastic mulch to maintain ideal soil moisture and to encourage productive plants.

Each season, rotate plant families — avoid planting crops from the same plant family in the same area of the garden — to reduce disease and pests. A longer crop rotation is recommended for Solanaceae crops to avoid Verticillium wilt disease.

Plant Care


To prevent a bitter-tasting eggplant, make sure the soil has adequate moisture and irrigate during dry and hot weather. Consistent watering of about 1 inch per week is recommended, using a thorough soaking to promote deep root growth. Increase watering during high temperatures and high winds, or for sandy soils.


Eggplants may produce small, misshapen fruits if inadequately supplied with nitrogen. Like many solanaceous crops, they are prone to blossom-end rot, a disorder resulting from calcium deficiency. This may be due to inconsistent watering, which may cause calcium to be poorly dissolved in the soil for uptake. If blossom-end rot persists with even watering, conduct a soil test, and discuss the results with a local county extension agent.

Organic fertilizers such as compost, fish emulsion, composted poultry litter or manure, worm castings, and blood or bone meal originate from living organisms. They are far more environmentally sustainable and safe than traditional synthetic fertilizers. They naturally release nutrients more slowly and over a longer period of time. When applying organic fertilizer, it is important to use in unison with compost, cover crops, and crop rotation, which all work together to build soil health. Learn how to convert inorganic fertilizer recommendations to organic fertilizers here.

Alternatively, a synthetic fertilizer may be used at a rate of about 1.25 lbs (2.5 cups) of 13-13-13 for every 25 feet of row or 75 square feet. Broadcast, or sprinkle evenly, over the soil before planting and then mix in about 3-6 inches deep using a rake. Supplemental sidedressing, or reapplication of synthetic fertilizer, is recommended when the first immature fruits are visible. Sidedressing is the addition of a small amount of fertilizer to the soil around already established plants when the plant begins to fruit or vine, primarily to provide nitrogen. When using synthetic fertilizer, sprinkle 2 tablespoons around each plant, keeping it about 6 inches away from the plant stem; water into the soil. Additional sidedressing may be applied every 3-4 weeks to keep this long season crop productive. Fish emulsion is a good, fast-release source of nitrogen for sidedressing if an organic fertilizer is preferred.


It is recommended to stake and trellis eggplant as it grows to avoid collapsing and falling over due to the weight of the fruit, and to prevent wind damage. Staking will also improve yield and fruit quality. The recommended, most effective staking and trellising method is the Florida Weave Technique. Place a metal T-post at the end of each row and one in the middle; then place squared wooden stakes between every few eggplants. When the plants are 12-15 inches tall, use garden or butcher twine to weave between each plant (about 10 inches above the soil) on both sides and tie the twine to the stakes. In this method, the plant is never tied to the twine or stake. It is recommended to do one more level of trellising when the plants have grown another 12-15 inches, about 10 inches above the last support weave. Watch this helpful video tutorial on the Florida Weave System (skip to 4:00 for eggplant-specific trellising).


Plastic mulch will control most of the weeds; hand-pull weeds close to the plant, especially in the planting holes.

Insect Pests and Diseases

Eggplants are hardy and can withstand moderate insect pressure, but regular garden monitoring is recommended to identify insect pest issues. Common insect pests for eggplants include aphids, whiteflies, flea beetles, cutworms, and red spider mites. Most eggplant diseases are caused by fungus due to high humidity and moderate temperatures. Generally, prevent diseases by selecting disease-resistant eggplant varieties; rotating crops; following the recommended spacing and watering; and removing diseased plants. Common diseases for eggplants include blight, leaf spot, Phomopsis fruit rot, and Verticillium wilt. See Table 3 to aid in diagnosis and management of some common eggplant insect pests and diseases.

Table 3. Organic and Natural Management for Common Eggplant Insect Pests and Diseases

Symptoms Diagnosis Organic and Natural Pest Management
• Curled and yellowed leaves
• Stunted crops
• Sticky honeydew on leaves that can lead to a sooty mold around plant base
  • Timely planting and harvest
  • Reduce water stress
  • Weed control
  • Use water jet to dislodge
  • Reflective mulches, insect barrier fabric
  • Beneficial insects: lady bugs, lacewings, predatory stink bugs, syrphid flies
  • Insecticidal soap, neem oil, pyrethrin, Azera
• Soil-borne fungus
• Leaf blight and defoliation; low quality fruit; sun scald
• May cause collar rot, stem canker, and fruit rot
Early blight
  • Plant resistant varieties
  • Crop rotation
  • Remove plant debris; till under residue
  • Avoid overhead irrigation
  • Organic/natural fungicide sprays
• Small, irregular holes in leaves
• Concentrated damage in young plants and seedlings
• Stunted plants; reduced yield
Flea beetle
• Warm, humid conditions between 59-77 degrees F
• Yellow concentric rings OR irregular brown spots with light gray center
• Spots appear on lower leaves first and then move up
• Leaf drop and sunscald
Leaf spot
  • Plant resistant varieties
  • Avoid overhead irrigation
  • Avoid working in fields when plants are wet
  • Reduce plant stress
  • Control weeds and incorporate plant debris
  • Use organic/natural copper-based fungicides
• Brown, elongated lesions on stems
• Dead leaves
• Multiple, tan-colored, sunken areas on fruit
• Fruit not reaching full size, ripening prematurely

Phomopsis fruit rot and blight
  • Plant resistant varieties
  • Remove diseased fruit
  • Use organic/natural fungicides
• Plants wilt and die
• Brown streaks inside root and lower stem when split lengthwise
Verticillium wilt
• Leaf discoloration and wilt
• Tiny white flies flutter when plants are disturbed
• Sticky honeydew on leaves
• Sooty mold fungus
  • Regular monitoring of plants
  • Crop rotation
  • Insect netting (50+ mesh)
  • Beneficial insects: lacewings, parasitic wasps, predatory mites
  • Insecticidal soap, neem oil, Beauveria bassiana

Note: Table adapted from LSU AgCenter; Texas A&M AgriLife Extension; UC Davis; Alabama A&M and Auburn Universities Extension; and UMass Extension. The Louisiana Pesticide Law regulates the use of pesticides in schools to protect children and staff from harmful exposure to chemicals and is enforced by LDAF. The recommended alternative to routine pesticide use is Integrated Pest Management (IPM), which combines pest control, disease management techniques and organic/natural alternatives, many of which are found in this table.

Harvest and Storage

Harvest eggplant throughout the summer when the skin is glossy and the fruit reaches the approximate harvest size (it’s better to harvest young than to have overmatured fruit). A good test is to press the fruit with the thumb: if the flesh bounces back, it’s ready to harvest; if it’s firm and hard, it’s too young. Clip the fruit, leaving a small stem attached (1/2 inch), using a knife or shears (avoid twisting/breaking the stems). Wear gloves when harvesting eggplant, since the stem and calyx (green top of the eggplant) often have prickly thorns. Keep plants well-picked (harvest once or twice a week) and remove overmatured or poor-quality fruit to encourage high productivity.

Eggplants can be stored in the refrigerator for 5-7 days (ideal storage temperature is 46-54 degrees F, with 90-95% relative humidity). Do not cut the fruit until you are ready to use it, as eggplant will quickly turn brown. The fruits also bruise easily, so avoid overhandling.

Preserve eggplant by freezing raw or cooked (blanched or fried) slices in freezer bags for up to 8 months.

Eggplant is Nutritious and Good for You

Good source of dietary fiber

Important for bowel health, lowering cholesterol, controlling blood sugar, and maintaining a healthy weight

High in Potassium

Essential for body function, especially the heart, kidney, nerves, bones


Louisiana Harvest of the Month: Eggplant Parmesan

Common methods of preparing and cooking eggplant

Video on how to cut an eggplant

Taste-testing ideas: baked crispy eggplant sticks with marinara sauce, eggplant dip (baba ghanoush) with pita wedges, ratatouille

Other websites with many eggplant recipes:

USDA MyPlate Kitchen

SNAP-Ed San Francisco

SNAP-Ed Arizona

Produce for Better Health Foundation