When to plant in Coldwater, MI
USDA Zone 6aColdwater, Michigan frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6a, Coldwater gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
COLDWATER ST SCHOOL · 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 Coldwater’s own odds, recorded at COLDWATER ST SCHOOL.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 14 | Apr 29 | Sep 19 | Oct 2 | Oct 15 |
| 32°F | May 18 | May 2 | Apr 18 | Sep 30 | Oct 13 | Oct 30 |
| 28°F | May 8 | Apr 21 | Apr 6 | Oct 12 | Oct 28 | Nov 9 |
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 Coldwater, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 31 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.
Coldwater planting FAQ
When is the last spring frost in Coldwater, MI?
Plan for the last spring frost in Coldwater around May 2 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Coldwater, MI?
Expect Coldwater's first fall frost near October 13 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Coldwater in?
Coldwater 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 Coldwater?
Coldwater has about 164 frost-free days — a moderate growing season — between the average last spring frost (May 2) and first fall frost (October 13).
When should I plant tomatoes in Coldwater?
For Coldwater, 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 Coldwater
An email when it’s time to start seeds, transplant, and sow — timed to Coldwater’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Sturgis · 38 km
- Battle Creek · 44 km
- Portage · 56 km
- Jackson · 59 km
- Kendallville · 60 km
- Kalamazoo · 61 km
- Auburn · 64 km
- Adrian · 79 km
Frost dates recorded at COLDWATER ST SCHOOL, 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 Coldwater, MI — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00201675. Retrieved from https://blissgarden.com/michigan/coldwater.