When to plant in Detroit Lakes, MN
USDA Zone 4aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Detroit Lakes, Minnesota — all computed from Detroit Lakes's nearest NOAA weather station.
In zone 4a, Detroit Lakes winters are severe; choose cold-hardy perennials and time annuals carefully around the frost dates above.
The average last spring frost in Detroit Lakes is now 7 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
DETROIT LAKES 1 NNE · 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 Detroit Lakes’s own odds, recorded at DETROIT LAKES 1 NNE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 7 | May 26 | May 12 | Aug 28 | Sep 13 | Sep 27 |
| 32°F | May 30 | May 15 | May 2 | Sep 9 | Sep 24 | Oct 6 |
| 28°F | May 19 | May 5 | Apr 24 | Sep 18 | Oct 3 | Oct 18 |
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 Detroit Lakes, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Detroit Lakes planting FAQ
When is the last spring frost in Detroit Lakes, MN?
Detroit Lakes's average last spring frost falls near May 15 — 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 Detroit Lakes, MN?
In Detroit Lakes, the first 32°F freeze of fall lands around September 24 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Detroit Lakes in?
Detroit Lakes is in USDA hardiness zone 4a. In zone 4a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Detroit Lakes?
Detroit Lakes has about 132 frost-free days — a short growing season — between the average last spring frost (May 15) and first fall frost (September 24).
When should I plant tomatoes in Detroit Lakes?
For Detroit Lakes, sow tomatoes indoors about March 20–April 3 and move the seedlings out around May 22, after the last spring frost.
Never miss a window in Detroit Lakes
An email when it’s time to start seeds, transplant, and sow — timed to Detroit Lakes’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fergus Falls · 61 km
- Moorhead · 69 km
- Fargo · 75 km
- West Fargo · 81 km
- Bemidji · 105 km
- Alexandria · 110 km
- Brainerd · 136 km
- Grand Forks · 155 km
Frost dates recorded at DETROIT LAKES 1 NNE, 3 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 Detroit Lakes, MN — Frost Dates & Zone 4a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00212142. Retrieved from https://blissgarden.com/minnesota/detroit-lakes.