When to plant in Rosemount, MN
USDA Zone 5aEverything below — frost dates, hardiness zone, and what to plant when in Rosemount, Minnesota — is derived from the closest NOAA station with complete climate normals.
In zone 5a, Rosemount gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
ROSEMOUNT RSCH & OUTREACH CTR · 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 Rosemount’s own odds, recorded at ROSEMOUNT RSCH & OUTREACH CTR.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 26 | May 12 | Apr 29 | Sep 16 | Sep 28 | Oct 10 |
| 32°F | May 16 | May 2 | Apr 19 | Sep 22 | Oct 5 | Oct 19 |
| 28°F | May 7 | Apr 22 | Apr 8 | Oct 2 | Oct 17 | 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 Rosemount, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Rosemount planting FAQ
When is the last spring frost in Rosemount, MN?
Rosemount'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 Rosemount, MN?
The first fall frost in Rosemount typically arrives around October 5 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Rosemount in?
Rosemount 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 Rosemount?
Rosemount has about 156 frost-free days — a moderate growing season — between the average last spring frost (May 2) and first fall frost (October 5).
When should I plant tomatoes in Rosemount?
For Rosemount, 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 Rosemount
An email when it’s time to start seeds, transplant, and sow — timed to Rosemount’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Inver Grove Heights · 9 km
- Apple Valley · 10 km
- Eagan · 11 km
- Farmington · 12 km
- Cottage Grove · 14 km
- Mendota Heights · 16 km
- South St. Paul · 16 km
- Lakeville · 16 km
Frost dates recorded at ROSEMOUNT RSCH & OUTREACH CTR, 4 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 Rosemount, MN — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00217107. Retrieved from https://blissgarden.com/minnesota/rosemount.