When to plant in Warren, MI
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Warren, Michigan — all computed from Warren's nearest NOAA weather station.
In zone 6b, Warren gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
DETROIT CITY AP · 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 Warren’s own odds, recorded at DETROIT CITY AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 1 | Apr 19 | Oct 2 | Oct 18 | Oct 31 |
| 32°F | May 6 | Apr 21 | Apr 7 | Oct 17 | Oct 31 | Nov 11 |
| 28°F | Apr 22 | Apr 8 | Mar 27 | Oct 29 | Nov 9 | Nov 23 |
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 Warren, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Warren planting FAQ
When is the last spring frost in Warren, MI?
Plan for the last spring frost in Warren around April 21 (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 Warren, MI?
Expect Warren's first fall frost near October 31 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Warren in?
Warren 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 Warren?
Warren has about 193 frost-free days — a moderate growing season — between the average last spring frost (April 21) and first fall frost (October 31).
When should I plant tomatoes in Warren?
For Warren, sow tomatoes indoors about February 24–March 10 and move the seedlings out around April 28, after the last spring frost.
Never miss a window in Warren
An email when it’s time to start seeds, transplant, and sow — timed to Warren’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Madison Heights · 7 km
- Hazel Park · 7 km
- Eastpointe · 7 km
- Roseville · 7 km
- Fraser · 8 km
- Ferndale · 9 km
- Sterling Heights · 10 km
- Harper Woods · 10 km
Frost dates recorded at DETROIT CITY AP, 9 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 Warren, MI — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014822. Retrieved from https://blissgarden.com/michigan/warren.