When to plant in Sidney, OH
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Sidney, Ohio — all computed from Sidney's nearest NOAA weather station.
Zone 6a means Sidney sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in Sidney is now 8 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
SIDNEY 1 S · 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 Sidney’s own odds, recorded at SIDNEY 1 S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 19 | May 5 | Apr 22 | Sep 25 | Oct 8 | Oct 22 |
| 32°F | May 12 | Apr 27 | Apr 12 | Oct 5 | Oct 20 | Nov 2 |
| 28°F | May 2 | Apr 16 | Apr 1 | Oct 17 | Oct 31 | Nov 12 |
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 Sidney, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 34 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.
Sidney planting FAQ
When is the last spring frost in Sidney, OH?
Plan for the last spring frost in Sidney around April 27 (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 Sidney, OH?
Expect Sidney's first fall frost near October 20 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Sidney in?
Sidney is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Sidney?
There are roughly 176 frost-free days in Sidney (a moderate growing season), running from the average last frost around April 27 to the first fall frost near October 20.
When should I plant tomatoes in Sidney?
In Sidney, start tomato seeds indoors around March 2–March 16, then transplant seedlings outdoors around May 4 once the danger of frost has passed.
Never miss a window in Sidney
An email when it’s time to start seeds, transplant, and sow — timed to Sidney’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Piqua · 17 km
- Troy · 28 km
- Bellefontaine · 35 km
- Tipp City · 36 km
- Urbana · 40 km
- Greenville · 44 km
- Celina · 45 km
- Vandalia · 46 km
Frost dates recorded at SIDNEY 1 S, 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 Sidney, OH — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00337693. Retrieved from https://blissgarden.com/ohio/sidney.