When to plant in Westerville, OH
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Westerville, Ohio — is derived from the closest NOAA station with complete climate normals.
In zone 6b, Westerville gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Westerville is now 8 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
WESTERVILLE · 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 Westerville’s own odds, recorded at WESTERVILLE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 21 | May 2 | Apr 19 | Sep 27 | Oct 12 | Oct 25 |
| 32°F | May 10 | Apr 22 | Apr 9 | Oct 10 | Oct 24 | Nov 5 |
| 28°F | Apr 24 | Apr 9 | Mar 27 | Oct 21 | Nov 3 | Nov 18 |
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 Westerville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Westerville planting FAQ
When is the last spring frost in Westerville, OH?
Plan for the last spring frost in Westerville around April 22 (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 Westerville, OH?
Expect Westerville'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 Westerville in?
Westerville 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 Westerville?
Westerville has about 185 frost-free days — a moderate growing season — between the average last spring frost (April 22) and first fall frost (October 24).
When should I plant tomatoes in Westerville?
For Westerville, sow tomatoes indoors about February 25–March 11 and move the seedlings out around April 29, after the last spring frost.
Never miss a window in Westerville
An email when it’s time to start seeds, transplant, and sow — timed to Westerville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Worthington · 10 km
- Gahanna · 10 km
- New Albany · 12 km
- Powell · 15 km
- Columbus · 17 km
- Upper Arlington · 17 km
- Whitehall · 17 km
- Bexley · 18 km
Frost dates recorded at WESTERVILLE, 3 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 Westerville, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00338951. Retrieved from https://blissgarden.com/ohio/westerville.