When to plant in Ashtabula, OH
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Ashtabula, Ohio — all computed from Ashtabula's nearest NOAA weather station.
Zone 6b means Ashtabula sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
ASHTABULA CO 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 Ashtabula’s own odds, recorded at ASHTABULA CO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 30 | May 14 | Apr 28 | Sep 25 | Oct 7 | Oct 24 |
| 32°F | May 20 | May 2 | Apr 18 | Oct 4 | Oct 21 | Nov 5 |
| 28°F | May 6 | Apr 21 | Apr 5 | Oct 18 | Nov 3 | Nov 19 |
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 Ashtabula, 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.
Ashtabula planting FAQ
When is the last spring frost in Ashtabula, OH?
Plan for the last spring frost in Ashtabula 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 Ashtabula, OH?
Expect Ashtabula's first fall frost near October 21 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Ashtabula in?
Ashtabula 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 Ashtabula?
There are roughly 172 frost-free days in Ashtabula (a moderate growing season), running from the average last frost around May 2 to the first fall frost near October 21.
When should I plant tomatoes in Ashtabula?
In Ashtabula, start tomato seeds indoors around March 7–March 21, then transplant seedlings outdoors around May 9 once the danger of frost has passed.
Never miss a window in Ashtabula
An email when it’s time to start seeds, transplant, and sow — timed to Ashtabula’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Conneaut · 20 km
- Painesville · 42 km
- Mentor · 49 km
- Willoughby · 57 km
- Eastlake · 58 km
- Meadville · 60 km
- Willowick · 62 km
- Wickliffe · 63 km
Frost dates recorded at ASHTABULA CO AP, 14 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 Ashtabula, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00004857. Retrieved from https://blissgarden.com/ohio/ashtabula.