When to plant in Haslett, MI
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Haslett, Michigan — all computed from Haslett's nearest NOAA weather station.
Zone 6a means Haslett sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
EAST LANSING 4 S · 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 Haslett’s own odds, recorded at EAST LANSING 4 S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 27 | May 8 | Apr 23 | Sep 22 | Oct 4 | Oct 18 |
| 32°F | May 16 | Apr 28 | Apr 13 | Oct 1 | Oct 17 | Nov 1 |
| 28°F | May 1 | Apr 15 | Apr 2 | Oct 14 | Oct 30 | Nov 13 |
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 Haslett, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 32 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.
Haslett planting FAQ
When is the last spring frost in Haslett, MI?
On average, the last spring frost in Haslett is around April 28 (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 Haslett, MI?
The first fall frost in Haslett typically arrives around October 17 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Haslett in?
Haslett is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Haslett?
There are roughly 172 frost-free days in Haslett (a moderate growing season), running from the average last frost around April 28 to the first fall frost near October 17.
When should I plant tomatoes in Haslett?
In Haslett, start tomato seeds indoors around March 3–March 17, then transplant seedlings outdoors around May 5 once the danger of frost has passed.
Never miss a window in Haslett
An email when it’s time to start seeds, transplant, and sow — timed to Haslett’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at EAST LANSING 4 S, 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 Haslett, MI — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202395. Retrieved from https://blissgarden.com/michigan/haslett.