When to plant in St. Louis Park, MN
USDA Zone 5aEverything below — frost dates, hardiness zone, and what to plant when in St. Louis Park, Minnesota — is derived from the closest NOAA station with complete climate normals.
Zone 5a means St. Louis Park sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in St. Louis Park is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
NEW HOPE · 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 St. Louis Park’s own odds, recorded at NEW HOPE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 23 | May 8 | Apr 26 | Sep 19 | Oct 1 | Oct 14 |
| 32°F | May 12 | Apr 29 | Apr 15 | Sep 29 | Oct 12 | Oct 25 |
| 28°F | May 1 | Apr 19 | Apr 5 | Oct 8 | Oct 22 | Nov 4 |
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 St. Louis Park, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
St. Louis Park planting FAQ
When is the last spring frost in St. Louis Park, MN?
St. Louis Park's average last spring frost falls near April 29 — 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 St. Louis Park, MN?
In St. Louis Park, the first 32°F freeze of fall lands around October 12 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is St. Louis Park in?
St. Louis Park 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 St. Louis Park?
There are roughly 166 frost-free days in St. Louis Park (a moderate growing season), running from the average last frost around April 29 to the first fall frost near October 12.
When should I plant tomatoes in St. Louis Park?
In St. Louis Park, start tomato seeds indoors around March 4–March 18, then transplant seedlings outdoors around May 6 once the danger of frost has passed.
Never miss a window in St. Louis Park
An email when it’s time to start seeds, transplant, and sow — timed to St. Louis Park’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Hopkins · 4 km
- Golden Valley · 5 km
- Edina · 6 km
- Minnetonka · 7 km
- Minneapolis · 8 km
- Robbinsdale · 9 km
- New Hope · 10 km
- Crystal · 10 km
Frost dates recorded at NEW HOPE, 7 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 St. Louis Park, MN — Frost Dates & Zone 5a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00215838. Retrieved from https://blissgarden.com/minnesota/st-louis-park.