When to plant in Blaine, MN
USDA Zone 5aEverything below — frost dates, hardiness zone, and what to plant when in Blaine, Minnesota — is derived from the closest NOAA station with complete climate normals.
In zone 5a, Blaine gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
ANDOVER 1N · 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 Blaine’s own odds, recorded at ANDOVER 1N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 31 | May 16 | May 2 | Sep 10 | Sep 24 | Oct 6 |
| 32°F | May 21 | May 5 | Apr 23 | Sep 18 | Oct 2 | Oct 16 |
| 28°F | May 9 | Apr 25 | Apr 11 | Sep 27 | Oct 13 | Oct 27 |
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 Blaine, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Blaine planting FAQ
When is the last spring frost in Blaine, MN?
On average, the last spring frost in Blaine is around May 5 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Blaine, MN?
In Blaine, 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 Blaine in?
Blaine is in USDA hardiness zone 5a. In zone 5a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Blaine?
Blaine has about 150 frost-free days — a moderate growing season — between the average last spring frost (May 5) and first fall frost (October 2).
When should I plant tomatoes in Blaine?
For Blaine, sow tomatoes indoors about March 10–March 24 and move the seedlings out around May 12, after the last spring frost.
Never miss a window in Blaine
An email when it’s time to start seeds, transplant, and sow — timed to Blaine’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Mounds View · 7 km
- Lino Lakes · 8 km
- Coon Rapids · 8 km
- Ham Lake · 9 km
- Fridley · 10 km
- Shoreview · 11 km
- New Brighton · 11 km
- Brooklyn Park · 13 km
Frost dates recorded at ANDOVER 1N, 11 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 Blaine, MN — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00210190. Retrieved from https://blissgarden.com/minnesota/blaine.