ZonePlant

State reference · Midwest

Iowa

Iowa (IA) covers 4 primary USDA hardiness zones across 1,042 zip codes. Capital: Des Moines.


USDA hardiness zones in Iowa

Zone share is computed from the 1,042 zip codes within Iowa. The most common zone is the best starting point for state-wide guidance; check your local zip for microclimate accuracy.

State-wide baseline

Zone 5a covers the largest share of Iowa, with winter lows around -20°F to -15°F and a typical growing season of 150 days. Zone 5a guide →

Crops suited to Iowa

Crops whose recommended USDA zone range overlaps Iowa's dominant zones. 87 crops match.

Tree fruit

12 crops

See all 12 tree fruit →

Berries

20 crops

See all 20 berries →

Nuts

6 crops

Vegetables

40 crops

See all 40 vegetables →

Herbs

9 crops

See all 9 herbs →

Largest cities in Iowa

Cities ranked by population (GeoNames public-domain data). Each city has a curated planting reference with its USDA zone, frost dates, and recommended crops.

Curated zip pages in Iowa

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