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Eggplant

Eggplant

Solanum melongena
A warm-season member of the nightshade family (Solanaceae) - a relative of tomato, potato, and pepper - grown for its showy, glossy edible berries that range from white and green through deep purple to nearly black depending on cultivar. The plant is technically a tender herbaceous perennial but is grown as an annual vegetable across most of North America, where it demands a long, hot, frost-free season to fruit well. Drooping violet star-shaped flowers give way to the familiar pendant fruit; the leaves, flowers, stems, and roots are toxic and only the fruit is eaten.
Climate fit: narrow (39/100)
Edible
Container
Focal point
Light
Full sun
Water
Moderate water
Mature size
2-4 ft tall · 21" apart
Hardy in zones
9a-12b
frosty to frost-free winters
AHS heat range
6-12
Plant range authored in AHS heat-zone terms.
Native in Illinois
No
Only the fruit is eaten - the immature-but-colored, glossy berry is harvested and cooked (fried, grilled, roasted, steamed, or stewed).

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Won't grow here
Zone 7a
Plotwright
0°F to 5°F
Won't grow here
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Out of range today and still out of range in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 4 ecoregions - 3 climate-resilient through 2070 · 1 newly possible by 2070. Best matches first.

Plant this, not that

Better fit for this place
For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
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A terrestrial bromeliad grown for its sweet, golden, edible fruit - the abacaxi of warm Brazil. POWO records it as South American in origin, its precise wild range obscured by ancient domestication, and Flora e Funga do Brasil documents Ananas in Brazil. The plant forms a low rosette of stiff, sword-shaped leaves, many forms armed with sharply toothed margins, from the centre of which a single stout stem rises bearing a dense cone of small purple flowers. Those flowers fuse together into the familiar multiple fruit (a syncarp), topped by a leafy crown that can itself be rooted to grow another plant. HONESTY: this is a frost-tender tropical, hardy in the ground only in roughly USDA zones 10a-11b, and it is slow - a plant takes well over a year from planting to a ripe fruit. Commercial clones are largely self-incompatible and, kept isolated from other clones, set the seedless fruit prized in the kitchen.
Perennial
Full sun
Moderate water
Zones 10a-11b
Climate: narrow
Edible
Focal point
Container
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Shrub
Full sun / Part sun
Consistent moisture
Zones 7a-9b
Climate: narrow
Focal point
Edible
Structure
Container
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Vegetable
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Zones 2-11
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Container
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Full sun
Moderate water
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Climate: moderate
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Container
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Moderate water
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Vegetable
Full sun
Moderate water
Zones 7-10
Climate: narrow
Edible
Structure
Focal point
Pollinator

Educator packet

Plant packet
Eggplant educator packet
A warm-season member of the nightshade family (Solanaceae) - a relative of tomato, potato, and pepper - grown for its showy, glossy edible berries that range from white and green through deep purple to nearly black depending on cultivar. The plant is technically a tender herbaceous perennial but is grown as an annual vegetable across most of North America, where it demands a long, hot, frost-free season to fruit well. Drooping violet star-shaped flowers give way to the familiar pendant fruit; the leaves, flowers, stems, and roots are toxic and only the fruit is eaten.
Scientific name
Solanum melongena
Plant type
vegetable
Hardiness
9a-12b
Light
full-sun
Moisture
moderate
Spacing
21 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Eggplant (Solanum melongena). Retrieved 2026, August 20, from https://plotwright.com/plants/solanum-melongena
Sources used for this record
This record is compiled from the sources below.
Plants of the World Online (POWO)
Botanical research database
Missouri Botanical Garden PlantFinder
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo · CC BY-SA 3.0
NC State Extension Gardener Plant Toolbox
University extension service