Gardening in USDA Zone 4b
moderate growing season · Frost-free ~120-150 days · Min temp -25°F to -20°F
❄️ Frost Dates — Zone 4b
Plant warm-weather crops after this date. Check 10-day forecasts before setting out tender plants.
Count back from this date to know how long your growing window is.
📍 Where is Zone 4b?
Iowa, southern Wisconsin, northern Illinois, much of New England
🌱 Soil & Growing Notes
Rich prairie loams common in Midwest; rockier soils in Northeast. Test pH — amend as needed.
What Grows Well in Zone 4b?
Zone 4b has a moderate growing season with roughly ~120-150 days of frost-free weather — last spring frost around May 7, first fall frost around October 1. That's enough time for 40+ popular garden plants, from fast-growing leafy greens to longer-season fruiting crops. Below is our curated list of plants that thrive in your zone.
🥕 Best Vegetables for Zone 4b
🌿 Best Herbs for Zone 4b
🍓 Best Fruits for Zone 4b
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