When to plant in Grand Haven, MI
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Grand Haven, Michigan — is derived from the closest NOAA station with complete climate normals.
Zone 6b means Grand Haven sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
GRAND HAVEN WWTP · 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 Grand Haven’s own odds, recorded at GRAND HAVEN WWTP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 30 | May 13 | Apr 26 | Sep 25 | Oct 9 | Oct 25 |
| 32°F | May 16 | Apr 30 | Apr 17 | Oct 5 | Oct 24 | Nov 6 |
| 28°F | May 6 | Apr 18 | Apr 4 | Oct 21 | Nov 5 | Nov 22 |
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 Grand Haven, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 28 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.
Grand Haven planting FAQ
When is the last spring frost in Grand Haven, MI?
Plan for the last spring frost in Grand Haven around April 30 (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 Grand Haven, MI?
Expect Grand Haven's first fall frost near October 24 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Grand Haven in?
Grand Haven is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Grand Haven?
There are roughly 177 frost-free days in Grand Haven (a moderate growing season), running from the average last frost around April 30 to the first fall frost near October 24.
When should I plant tomatoes in Grand Haven?
In Grand Haven, start tomato seeds indoors around March 5–March 19, then transplant seedlings outdoors around May 7 once the danger of frost has passed.
Never miss a window in Grand Haven
An email when it’s time to start seeds, transplant, and sow — timed to Grand Haven’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Norton Shores · 13 km
- Muskegon · 19 km
- Allendale · 24 km
- Holland · 33 km
- Jenison · 36 km
- Walker · 38 km
- Grandville · 42 km
- Comstock Park · 44 km
Frost dates recorded at GRAND HAVEN WWTP, 1 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 Grand Haven, MI — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00203295. Retrieved from https://blissgarden.com/michigan/grand-haven.