Iowa Planting Zones & Schedule

In Iowa, USDA growing zones range from Zone 4b in higher elevations to Zone 6a in the south, reflecting the state’s varied climate. Northern and central Iowa, which fall mainly in Zone 5a, have cooler growing conditions ideal for hardy vegetables like kale, lettuce, and root crops.

Southern Iowa is milder, lying within Zones 5b and 6a. The longer frost-free period there makes it possible to grow warm-season crops such as tomatoes and peppers.

 

Iowa Last & First Frost Dates

  • *Keep in mind that frost can occur before or after these dates. Watch your local weather to determine the best time to plant.

  • The growing season in Iowa ranges from about 150 days in the north to around 180 days in the southern parts of the state. Refer to the planting schedules below to determine the best timing for your zone.

Zone 4 Planting Schedule

Zone 5 Planting Schedule

Zone 6 Planting Schedule