When to plant in Big Lake, MN
USDA Zone 4bEverything below — frost dates, hardiness zone, and what to plant when in Big Lake, Minnesota — is derived from the closest NOAA station with complete climate normals.
In zone 4b, Big Lake winters are severe; choose cold-hardy perennials and time annuals carefully around the frost dates above.
Frost probability
ELK RVR · 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 Big Lake’s own odds, recorded at ELK RVR.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 28 | May 13 | May 1 | Sep 16 | Sep 28 | Oct 9 |
| 32°F | May 18 | May 4 | Apr 22 | Sep 23 | Oct 5 | Oct 18 |
| 28°F | May 9 | Apr 25 | Apr 11 | Oct 3 | Oct 17 | Oct 29 |
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 Big Lake, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Big Lake planting FAQ
When is the last spring frost in Big Lake, MN?
On average, the last spring frost in Big Lake is around May 4 (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 Big Lake, MN?
In Big Lake, the first 32°F freeze of fall lands around October 5 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Big Lake in?
Big Lake 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 Big Lake?
Big Lake has about 154 frost-free days — a moderate growing season — between the average last spring frost (May 4) and first fall frost (October 5).
When should I plant tomatoes in Big Lake?
For Big Lake, sow tomatoes indoors about March 9–March 23 and move the seedlings out around May 11, after the last spring frost.
Never miss a window in Big Lake
An email when it’s time to start seeds, transplant, and sow — timed to Big Lake’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Monticello · 6 km
- Otsego · 13 km
- Elk River · 14 km
- St. Michael · 16 km
- Buffalo · 20 km
- Rogers · 22 km
- Ramsey · 25 km
- Anoka · 31 km
Frost dates recorded at ELK RVR, 13 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 Big Lake, MN — Frost Dates & Zone 4b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00212500. Retrieved from https://blissgarden.com/minnesota/big-lake.