When to plant in Chaska, MN
USDA Zone 4bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Chaska, Minnesota — all computed from Chaska's nearest NOAA weather station.
In zone 4b, Chaska winters are severe; choose cold-hardy perennials and time annuals carefully around the frost dates above.
Frost probability
CHASKA 2NW · 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 Chaska’s own odds, recorded at CHASKA 2NW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 16 | May 4 | Sep 15 | Sep 27 | Oct 8 |
| 32°F | May 19 | May 5 | Apr 21 | Sep 22 | Oct 5 | Oct 18 |
| 28°F | May 6 | Apr 23 | Apr 8 | Oct 1 | Oct 16 | Oct 28 |
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 Chaska, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 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.
Chaska planting FAQ
When is the last spring frost in Chaska, MN?
Chaska's average last spring frost falls near May 5 — 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 Chaska, MN?
Expect Chaska's first fall frost near October 5 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Chaska in?
Chaska 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 Chaska?
Chaska has about 153 frost-free days — a moderate growing season — between the average last spring frost (May 5) and first fall frost (October 5).
When should I plant tomatoes in Chaska?
For Chaska, 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 Chaska
An email when it’s time to start seeds, transplant, and sow — timed to Chaska’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Chanhassen · 6 km
- Victoria · 8 km
- Shakopee · 12 km
- Eden Prairie · 12 km
- Waconia · 14 km
- Prior Lake · 17 km
- Minnetonka · 18 km
- Hopkins · 20 km
Frost dates recorded at CHASKA 2NW, 2 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 Chaska, MN — Frost Dates & Zone 4b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00211468. Retrieved from https://blissgarden.com/minnesota/chaska.