Alexandria, MN Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Alexandria, Minnesota.
Gardening in Alexandria
The Lakes Area's hub city sits in the lake country of west-central Minnesota, where the prairie-forest transition creates interesting growing conditions.
Zone 4a with 138 frost-free days. The surrounding lakes moderate temperatures slightly. Prairie-forest transition soil is productive. Northern conditions demand short-season varieties.
Alexandria's lake country tourism masks a productive agricultural community. The long summer days and fertile soil produce impressive yields in a compact season.
What This Means for Alexandria Gardeners
The average last spring frost in Alexandria is around May 10, and the average first fall frost arrives around September 25. That gives you approximately 138 frost-free days to work with.
138 frost-free days means every warm day counts. Focus on cold-hardy crops that thrive in your moderate temperatures: kale, lettuce, peas, radishes, potatoes, and root vegetables. For warm-season crops, choose only the shortest-season varieties (sub-65-day tomatoes, 55-day beans) and start everything indoors. Season extension — row covers, cold frames, plastic mulch — isn't a luxury here, it's essential infrastructure.
These dates are based on NOAA 30-year Climate Normal data for the Alexandria 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 Alexandria
With 138 frost-free days, Alexandria 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 Alexandria.
More About Zone 4A
Alexandria is in USDA Hardiness Zone 4A, which means average annual extreme minimum temperatures between -30°F to -25°F. View the full Zone 4A 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 Alexandria 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 Alexandria (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start everything possible indoors — your 138-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 10). Choose short-season varieties for warm crops. Enter your zip code for exact dates.