IA

Iowa Growing Guide

Capital: Des MoinesMidwest Region

Complete growing guide for Iowa gardeners. Learn what to plant, when to plant, and how to succeed with humid continental climate conditions across zones 4, 5.

4, 5

USDA Zones

145-175

Days Season

April 20

Last Frost (Early)

September 25

First Frost (Early)

Climate & Growing Conditions

Climate Type

Humid Continental

Growing season of 145 to 175 days

Frost Dates

Last Spring Frost: April 20May 15

First Fall Frost: September 25October 15

Common Soil Types

Deep loessGlacial tillRiver bottom alluvial

⚠️ Growing Challenges

  • Flooding
  • Late spring
  • Corn/soybean pests
  • Variable weather

Growing Advantages

  • World-class soil
  • Adequate rainfall
  • Cool nights enhance flavor

Iowa's Famous Crops

Corn
Soybeans
Hogs
Sweet corn
Pumpkins

📅 Iowa Monthly Planting Calendar

See what to plant each month in Iowa based on your local frost dates

View Monthly Calendar →

Resources

Iowa Cooperative Extension

Get expert local advice from your state's agricultural extension service

Visit Iowa Extension →

Weekly Growing Tips

Get seasonal planting reminders, crop rotation tips, and farm planning strategies delivered weekly.