When to plant in Warren, OH
USDA Zone 6aWarren, Ohio frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 6a means Warren sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in Warren is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
WARREN 3 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 Warren’s own odds, recorded at WARREN 3 S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 3 | May 19 | May 2 | Sep 19 | Oct 2 | Oct 14 |
| 32°F | May 25 | May 8 | Apr 23 | Sep 30 | Oct 12 | Oct 26 |
| 28°F | May 15 | Apr 27 | Apr 13 | Oct 8 | Oct 26 | Nov 7 |
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 12 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, OH?
Warren's average last spring frost falls near May 8 — 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 Warren, OH?
Expect Warren's first fall frost near October 12 — 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 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Warren?
There are roughly 157 frost-free days in Warren (a moderate growing season), running from the average last frost around May 8 to the first fall frost near October 12.
When should I plant tomatoes in Warren?
In Warren, start tomato seeds indoors around March 13–March 27, then transplant seedlings outdoors around May 15 once the danger of frost has passed.
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- Niles · 8 km
- Austintown · 18 km
- Youngstown · 21 km
- Sharon · 26 km
- Hermitage · 31 km
- Ravenna · 37 km
- Salem · 37 km
- Aurora · 44 km
Frost dates recorded at WARREN 3 S, 4 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, OH — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00338769. Retrieved from https://blissgarden.com/ohio/warren.