When to plant in Blue Ash, OH
USDA Zone 6bBlue Ash, Ohio frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Blue Ash gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
MILFORD · 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 Blue Ash’s own odds, recorded at MILFORD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | May 2 | Apr 19 | Sep 29 | Oct 9 | Oct 18 |
| 32°F | May 8 | Apr 23 | Apr 9 | Oct 6 | Oct 18 | Oct 28 |
| 28°F | Apr 28 | Apr 11 | Mar 31 | Oct 16 | Oct 27 | Nov 9 |
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 Blue Ash, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Blue Ash planting FAQ
When is the last spring frost in Blue Ash, OH?
On average, the last spring frost in Blue Ash is around April 23 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Blue Ash, OH?
The first fall frost in Blue Ash typically arrives around October 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Blue Ash in?
Blue Ash 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 Blue Ash?
Blue Ash has about 178 frost-free days — a moderate growing season — between the average last spring frost (April 23) and first fall frost (October 18).
When should I plant tomatoes in Blue Ash?
For Blue Ash, sow tomatoes indoors about February 26–March 12 and move the seedlings out around April 30, after the last spring frost.
Never miss a window in Blue Ash
An email when it’s time to start seeds, transplant, and sow — timed to Blue Ash’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Montgomery · 3 km
- Sharonville · 4 km
- Reading · 5 km
- Springdale · 9 km
- Loveland · 10 km
- Norwood · 11 km
- Finneytown · 11 km
- Forest Park · 13 km
Frost dates recorded at MILFORD, 11 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 Blue Ash, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00335268. Retrieved from https://blissgarden.com/ohio/blue-ash.