When to plant in Alexandria, MN
USDA Zone 4bEverything below — frost dates, hardiness zone, and what to plant when in Alexandria, Minnesota — is derived from the closest NOAA station with complete climate normals.
In zone 4b, Alexandria winters are severe; choose cold-hardy perennials and time annuals carefully around the frost dates above.
Frost probability
ALEXANDRIA MUNI AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Alexandria’s own odds, recorded at ALEXANDRIA MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 27 | May 11 | Apr 30 | Sep 18 | Sep 30 | Oct 12 |
| 32°F | May 15 | May 2 | Apr 18 | Sep 27 | Oct 8 | Oct 20 |
| 28°F | May 4 | Apr 21 | Apr 8 | Oct 5 | Oct 19 | Oct 31 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Alexandria, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 39 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Alexandria planting FAQ
When is the last spring frost in Alexandria, MN?
Alexandria's average last spring frost falls near May 2 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Alexandria, MN?
In Alexandria, the first 32°F freeze of fall lands around October 8 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Alexandria in?
Alexandria is in USDA hardiness zone 4b. In zone 4b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Alexandria?
Alexandria has about 159 frost-free days — a moderate growing season — between the average last spring frost (May 2) and first fall frost (October 8).
When should I plant tomatoes in Alexandria?
For Alexandria, sow tomatoes indoors about March 7–March 21 and move the seedlings out around May 9, after the last spring frost.
Never miss a window in Alexandria
An email when it’s time to start seeds, transplant, and sow — timed to Alexandria’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fergus Falls · 70 km
- Willmar · 88 km
- Sartell · 95 km
- Sauk Rapids · 100 km
- St. Cloud · 101 km
- Brainerd · 105 km
- Detroit Lakes · 110 km
- Hutchinson · 135 km
Frost dates recorded at ALEXANDRIA MUNI AP, 2 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Alexandria, MN — Frost Dates & Zone 4b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014910. Retrieved from https://blissgarden.com/minnesota/alexandria.