Minneapolis, MN Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Minneapolis, Minnesota.
Gardening in Minneapolis
Minneapolis gardeners don't just survive winter — they plan for it, prepare through it, and explode out of it with a fury that produces some of the most intensive small-space food gardens in the country. When you only get 149 frost-free days, you learn to make every single one count.
Zone 4b is not for the faint of heart. Your last frost averages May 5 and your first frost arrives October 1, creating a compressed but surprisingly productive window. The good news: Minnesota's long summer days (16+ hours of daylight in June) drive plant growth at a rate that startles gardeners who've moved from the South. Your tomatoes grow fast because the sun literally never quits. The bad news: -20°F in January. But that kills pests beautifully.
Twins fans know about performing brilliantly in a short season before the cold shuts everything down — every Minneapolis garden tells the same story. The Mill City Farmers Market, the Midtown Greenway gardens, and the incredible density of backyard food production in South Minneapolis prove that cold climate is an explanation, not an excuse. The state fair's crop competitions are taken very, very seriously.
What This Means for Minneapolis Gardeners
The average last spring frost in Minneapolis is around May 5, and the average first fall frost arrives around October 1. That gives you approximately 149 frost-free days to work with.
At 149 days, you're working with a compressed but productive window. Choose varieties by their days-to-maturity number — anything under 75 days is safe, 75-90 requires indoor starting, and 90+ is a calculated risk. The tradeoff: your cool, moderate summers are excellent for crops that heat-zone gardeners struggle with. Your lettuce doesn't bolt in June. Your peas produce for weeks longer. Cool-season crops are your superpower.
These dates are based on NOAA 30-year Climate Normal data for the Minneapolis area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Minneapolis
With 149 frost-free days, Minneapolis gardeners need to plan strategically — start warm-season crops indoors and choose short-season varieties. Cool-season crops are your strength, thriving in the moderate temperatures that define your growing window. Recommended starting points: kale, lettuce, peas, carrots, potatoes, radishes, garlic, and short-season tomatoes.
See the full Minnesota planting guide for all 40 plants: Minnesota Planting Calendar. Or enter your zip code for exact planting dates personalized to Minneapolis.
More About Zone 4B
Minneapolis is in USDA Hardiness Zone 4B, which means average annual extreme minimum temperatures between -25°F to -20°F. View the full Zone 4B planting guide.
See the complete planting calendar for Minnesota: Minnesota Planting Calendar.
Other Cities in Minnesota
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Minneapolis area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Minneapolis (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start everything possible indoors — your 149-day season doesn't leave room for a slow start. Direct sow only the fastest, hardiest crops (radishes, lettuce, peas) 3-4 weeks before last frost (May 5). Choose short-season varieties for warm crops. Enter your zip code for exact dates.