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Sweet corn

Sweet corn

Zea mays
A tall, warm-season annual grass grown for its sweet kernels — one of the largest crops in the home vegetable garden at 4 to 5 feet. Corn is wind-pollinated, so it must be sown in a block of several rows rather than a single line for the tassels to set a full ear. A heavy feeder that wants full sun, fertile soil, and steady water; some sweet-corn types are spoiled by cross-pollination from other corn varieties, so isolation and harvest timing matter.
Climate fit: moderate (66/100)
Edible
Structure
Light
Full sun
Water
Consistent moisture
Mature size
48-60" tall · 12" apart
Hardy in zones
2a-11b
brutally cold to nearly frost-free winters
AHS heat range
4-11
Plant range authored in AHS heat-zone terms.
Native in Illinois
No

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Sweet corn is grown specifically for its edible kernels, harvested at the "milk stage" while still tender and sweet.

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
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving 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...

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Vicia faba
Fava bean
A cool-season annual legume of the bean family (Fabaceae), also called broad bean, grown as a vegetable for its edible seeds and pods. NC State Extension describes a stiffly erect plant 2-6 feet tall with leaves of 2-6 leaflets and conspicuous toothed stipules, bearing fragrant white spring-and-summer flowers marked with a purplish or brown blotch. The fruit is a narrowly oblong flattened pod up to 11 inches long holding up to 6 large oval seeds. Like other legumes it fixes nitrogen from the air and is often used as a cover crop; it grows best in cool weather, with poor yields once daytime temperatures exceed the mid-70s.
Vegetable
Full sun
Moderate water
Zones Annual; NC State lists no winter hardiness zone — grown as a cool-season vegetable
Edible
Pollinator
Structure
Cynara scolymus
Globe artichoke
A Mediterranean thistle relative grown as a perennial vegetable for its large, unopened flower bud — the edible "globe" of overlapping fleshy bracts harvested before bloom. It forms an upright clump of deeply lobed, jagged silver-green leaves, with flower stalks rising to 3-5 feet. Left unharvested, the buds open to spectacular violet-blue thistle flowers up to 7 inches across that are a magnet for bees.
Vegetable
Full sun
Moderate water
Zones 7-10
Climate: narrow
Edible
Structure
Focal point
Pollinator
Abelmoschus esculentus
Okra
A heat-loving annual of the mallow family (Malvaceae), native to the Old World tropics and grown for its edible seed pods — the backbone of gumbo. Plants reach 3-5 feet with showy hibiscus-like, single-day yellow flowers carrying a deep purple center. It thrives where summers are hot: seed should not go out until the soil reaches 60°F, and the first pods follow about 55 days after germination.
Vegetable
Full sun
Moderate water
Zones 2-11
Climate: moderate
Edible
Structure
Rubus allegheniensis
Allegheny blackberry
A native eastern + central North American thicket-forming shrub producing arching thorny canes + clusters of large sweet black berries in mid-to-late summer. Among the most important wildlife fruit producers in eastern forests — birds, mammals, + insects all depend on the fruit. Like raspberry, biennial-caned (primocane year 1, fruits in year 2 as floricane, then dies back). Spreads via root suckers + tip-rooting cane tips; manage with annual pruning.
Shrub
Full sun / Part sun
Moderate water
Zones 3a-8b
Climate: broad
Edible
Pollinator
Structure
Sambucus canadensis
American elderberry
A fast, suckering native shrub of streambanks and moist thickets across eastern North America, grown for huge flat-topped cymes of tiny lemon-scented white flowers in early summer and the clusters of dark elderberry drupes that follow. Spreads by root suckers into naturalized colonies 5-12 feet tall and wide; the flowers feed butterflies and the showy fruit feeds birds. The raw berries are not eaten fresh — they are cooked into jelly, pie, and wine.
Shrub
Full sun / Part sun / Part shade
Consistent moisture
Zones 3-9
Climate: broad
Structure
Edible
Pollinator
Focal point
Prunus maritima
Beach plum
A low, densely branching coastal shrub of northeastern dunes, smothered in white spring blossom and prized for the tart blue-purple plums that follow. The Lady Bird Johnson Wildflower Center documents it native from New Brunswick down the Atlantic seaboard to New Jersey, growing in sand and gravel near the sea, where it is both salt tolerant and drought tolerant. It carries Special Value to Native Bees, feeds birds with its fruit, and is self-incompatible — a second seedling is needed to set a real crop.
Shrub
Full sun
Low water
Zones 3a-7b
Climate: moderate
Structure
Pollinator
Edible

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Sweet corn (Zea mays). Retrieved 2026, June 24, from https://plotwright.com/plants/zea-mays
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Missouri Botanical Garden PlantFinder
Botanical research database
Backs 17 fields
Identity
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Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
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Design roles
Seasonal interest
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Regional guidance
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Wikimedia Commons
Photo · CC0 (public domain dedication)
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