When to plant in Fargo, ND
USDA Zone 4aEverything below — frost dates, hardiness zone, and what to plant when in Fargo, North Dakota — is derived from the closest NOAA station with complete climate normals.
Zone 4a is cold — in Fargo, most perennials must be fully hardy, and your frost dates set a tight window for tender annual vegetables.
Frost probability
FARGO 3S · 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 Fargo’s own odds, recorded at FARGO 3S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 26 | May 13 | May 2 | Sep 12 | Sep 24 | Oct 5 |
| 32°F | May 18 | May 4 | Apr 21 | Sep 22 | Oct 2 | Oct 15 |
| 28°F | May 9 | Apr 25 | Apr 10 | Sep 29 | Oct 12 | Oct 26 |
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 Fargo, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 7 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.
Fargo planting FAQ
When is the last spring frost in Fargo, ND?
Fargo's average last spring frost falls near May 4 — 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 Fargo, ND?
In Fargo, the first 32°F freeze of fall lands around October 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Fargo in?
Fargo 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 Fargo?
There are roughly 151 frost-free days in Fargo (a moderate growing season), running from the average last frost around May 4 to the first fall frost near October 2.
When should I plant tomatoes in Fargo?
In Fargo, start tomato seeds indoors around March 9–March 23, then transplant seedlings outdoors around May 11 once the danger of frost has passed.
Never miss a window in Fargo
An email when it’s time to start seeds, transplant, and sow — timed to Fargo’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- West Fargo · 6 km
- Moorhead · 6 km
- Detroit Lakes · 75 km
- Fergus Falls · 86 km
- Grand Forks · 119 km
- Jamestown · 142 km
- Alexandria · 156 km
- Bemidji · 163 km
Frost dates recorded at FARGO 3S, 5 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 Fargo, ND — Frost Dates & Zone 4a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00322860. Retrieved from https://blissgarden.com/north-dakota/fargo.