Agriculture in Iowa
ZIP codes in our Iowa data
USDA hardiness zones present
Iowa sits at the heart of the American Corn Belt, and farming shapes both its economy and its landscape. Row crops and livestock dominate the countryside, while home gardeners work some of the richest topsoil in the country. Understanding the state's crops, seasons, and soils helps growers and gardeners plan with confidence.
Farming in Iowa
Iowa is one of the nation's leading agricultural states, consistently ranking at or near the top for corn production and among the leaders for soybeans. Livestock is just as important: the state is the top producer of hogs and of eggs, and it also raises large numbers of beef and dairy cattle. Much of the corn crop feeds livestock or supplies ethanol plants, tying grain and animal agriculture closely together. Deep, fertile prairie soils and a favorable summer climate give Iowa a strong advantage for high-yield field crops.
Climate and growing conditions
Iowa has a humid continental climate with four distinct seasons, cold and snowy winters, and warm, humid summers that favor row-crop growth. The frost-free growing season generally runs from late April or early May into early October, lasting roughly 145 to 170 days depending on location, with the north being shorter than the south. USDA hardiness zones range from about 4b in the northern counties to 5b in the south, so a gardener may face anything from harsh northern winters to slightly milder conditions farther south.
Major agricultural products
- Corn
- Soybeans
- Hogs and pork
- Eggs
- Beef cattle
- Dairy
- Hay
- Oats
Hardiness zones in Iowa
Growers in Iowa fall across these USDA plant hardiness zones (by number of ZIP codes in our data):
Local weather & frost dates in Iowa
Open any location for its live forecast, frost dates, and planting calendar:
Counties in Iowa
Browse local growing conditions, hardiness zones, and weather by county (101 counties):
Market prices & data for Iowa
State overviews combine hardiness-zone data from our ZIP database with public USDA market reports and NOAA climate normals. For farm-level decisions, consult your state's Cooperative Extension service. Page updated Aug 4, 2026.