When to plant in Bluffton, IN
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Bluffton, Indiana — is derived from the closest NOAA station with complete climate normals.
Zone 6a means Bluffton sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
BLUFFTON 6N · 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 Bluffton’s own odds, recorded at BLUFFTON 6N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 3 | Apr 20 | Sep 27 | Oct 10 | Oct 22 |
| 32°F | May 9 | Apr 24 | Apr 10 | Oct 6 | Oct 20 | Nov 3 |
| 28°F | Apr 27 | Apr 12 | Mar 30 | Oct 19 | Nov 1 | Nov 15 |
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 Bluffton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Bluffton planting FAQ
When is the last spring frost in Bluffton, IN?
Bluffton's average last spring frost falls near April 24 — 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 Bluffton, IN?
The first fall frost in Bluffton typically arrives around October 20 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Bluffton in?
Bluffton 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 Bluffton?
There are roughly 179 frost-free days in Bluffton (a moderate growing season), running from the average last frost around April 24 to the first fall frost near October 20.
When should I plant tomatoes in Bluffton?
In Bluffton, start tomato seeds indoors around February 27–March 13, then transplant seedlings outdoors around May 1 once the danger of frost has passed.
Never miss a window in Bluffton
An email when it’s time to start seeds, transplant, and sow — timed to Bluffton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Huntington · 32 km
- New Haven · 38 km
- Fort Wayne · 38 km
- Marion · 46 km
- Van Wert · 51 km
- Huntertown · 53 km
- Celina · 56 km
- Wabash · 56 km
Frost dates recorded at BLUFFTON 6N, 8 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 Bluffton, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00120830. Retrieved from https://blissgarden.com/indiana/bluffton.