When to plant in Ironton, OH
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Ironton, Ohio — is derived from the closest NOAA station with complete climate normals.
In zone 7a, Ironton supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
ASHLAND · 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 Ironton’s own odds, recorded at ASHLAND.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 4 | Apr 18 | Oct 1 | Oct 14 | Oct 26 |
| 32°F | May 11 | Apr 22 | Apr 6 | Oct 11 | Oct 23 | Nov 3 |
| 28°F | May 1 | Apr 8 | Mar 24 | Oct 19 | Nov 1 | Nov 14 |
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 Ironton, 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.
Ironton planting FAQ
When is the last spring frost in Ironton, OH?
Plan for the last spring frost in Ironton 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 Ironton, OH?
The first fall frost in Ironton typically arrives around October 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Ironton in?
Ironton is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Ironton?
Ironton has about 184 frost-free days — a moderate growing season — between the average last spring frost (April 22) and first fall frost (October 23).
When should I plant tomatoes in Ironton?
For Ironton, 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 Ironton
An email when it’s time to start seeds, transplant, and sow — timed to Ironton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Ashland · 9 km
- Huntington · 25 km
- Portsmouth · 34 km
- Teays Valley · 66 km
- St. Albans · 77 km
- South Charleston · 87 km
- Charleston · 93 km
- Chillicothe · 94 km
Frost dates recorded at ASHLAND, 10 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 Ironton, OH — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00150254. Retrieved from https://blissgarden.com/ohio/ironton.