What Can Grow in Green Bay, WI

Green Bay near Lake Michigan has lake influence but still has cold winters and short summers.

Green Bay, WI is in USDA Hardiness Zone 5a. The growing season lasts about 138 days, with last frost around May 8 and first fall frost around October 18. Top crops include tomatoes, beans, broccoli.

5aUSDA Zone
138 daysFrost-Free
May 8Last Frost
October 18First Frost
🌱 What Grows in Green Bay
tomatoesbeansbroccolikaleroot vegetablesbeets
💡 Planting Tips

Lake Michigan influence. Short season — focus on fast-maturing varieties. Plant May 10.

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📍 Full Zone 5a Guide 🌎 Wisconsin Planting Guide

Frequently Asked Questions

Green Bay, WI is in USDA Plant Hardiness Zone 5a. Green Bay near Lake Michigan has lake influence but still has cold winters and short summers.

The average last spring frost in Green Bay is around May 8. The first fall frost typically arrives around October 18, giving a frost-free growing season of approximately 138 days.

Green Bay's Zone 5a climate supports growing tomatoes, beans, broccoli, kale, root vegetables, beets. Lake Michigan influence. Short season — focus on fast-maturing varieties. Plant May 10.

In Green Bay, start with cool-season crops like lettuce, spinach, and broccoli a few weeks before the last frost date of May 8. Warm-season crops like tomatoes and peppers should go in after all frost risk has passed.