What Can Grow in Rockford, IL

Rockford in northwest Illinois has more continental conditions than Chicago with cold winters and warm summers.

Rockford, IL is in USDA Hardiness Zone 5a. The growing season lasts about 143 days, with last frost around May 1 and first fall frost around October 19. Top crops include tomatoes, peppers, corn.

5aUSDA Zone
143 daysFrost-Free
May 1Last Frost
October 19First Frost
🌱 What Grows in Rockford
tomatoespepperscornbeansbrassicasroot vegetables
💡 Planting Tips

Colder winters than Chicago. Start warm crops after May 10. Good for root vegetables and cool crops.

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🔗 More Resources
📍 Full Zone 5a Guide 🌎 Illinois Planting Guide

Frequently Asked Questions

Rockford, IL is in USDA Plant Hardiness Zone 5a. Rockford in northwest Illinois has more continental conditions than Chicago with cold winters and warm summers.

The average last spring frost in Rockford is around May 1. The first fall frost typically arrives around October 19, giving a frost-free growing season of approximately 143 days.

Rockford's Zone 5a climate supports growing tomatoes, peppers, corn, beans, brassicas, root vegetables. Colder winters than Chicago. Start warm crops after May 10. Good for root vegetables and cool crops.

In Rockford, start with cool-season crops like lettuce, spinach, and broccoli a few weeks before the last frost date of May 1. Warm-season crops like tomatoes and peppers should go in after all frost risk has passed.