When to plant in Miamisburg, OH
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Miamisburg, Ohio — all computed from Miamisburg's nearest NOAA weather station.
In zone 6b, Miamisburg gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
DAYTON WRIGHT BROS 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 Miamisburg’s own odds, recorded at DAYTON WRIGHT BROS AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | Apr 29 | Apr 14 | Oct 4 | Oct 17 | Oct 28 |
| 32°F | May 6 | Apr 17 | Apr 3 | Oct 13 | Oct 26 | Nov 6 |
| 28°F | Apr 21 | Apr 5 | Mar 20 | Oct 23 | Nov 5 | Nov 20 |
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 Miamisburg, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Miamisburg planting FAQ
When is the last spring frost in Miamisburg, OH?
Miamisburg's average last spring frost falls near April 17 — 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 Miamisburg, OH?
The first fall frost in Miamisburg typically arrives around October 26 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Miamisburg in?
Miamisburg 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 Miamisburg?
Miamisburg has about 192 frost-free days — a moderate growing season — between the average last spring frost (April 17) and first fall frost (October 26).
When should I plant tomatoes in Miamisburg?
For Miamisburg, sow tomatoes indoors about February 20–March 6 and move the seedlings out around April 24, after the last spring frost.
Never miss a window in Miamisburg
An email when it’s time to start seeds, transplant, and sow — timed to Miamisburg’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- West Carrollton · 5 km
- Springboro · 8 km
- Franklin · 9 km
- Centerville · 11 km
- Kettering · 13 km
- Middletown · 16 km
- Dayton · 18 km
- Trotwood · 18 km
Frost dates recorded at DAYTON WRIGHT BROS AP, 6 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 Miamisburg, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053859. Retrieved from https://blissgarden.com/ohio/miamisburg.