When to plant in Seymour, IN
USDA Zone 6bSeymour, Indiana 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, Seymour gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Seymour is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
SEYMOUR 2 N · 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 Seymour’s own odds, recorded at SEYMOUR 2 N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 27 | Apr 14 | Sep 30 | Oct 12 | Oct 24 |
| 32°F | May 2 | Apr 16 | Apr 2 | Oct 7 | Oct 21 | Nov 1 |
| 28°F | Apr 19 | Apr 2 | Mar 19 | 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 Seymour, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 26 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.
Seymour planting FAQ
When is the last spring frost in Seymour, IN?
Plan for the last spring frost in Seymour around April 16 (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 Seymour, IN?
In Seymour, the first 32°F freeze of fall lands around October 21 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Seymour in?
Seymour 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 Seymour?
Seymour has about 188 frost-free days — a moderate growing season — between the average last spring frost (April 16) and first fall frost (October 21).
When should I plant tomatoes in Seymour?
For Seymour, sow tomatoes indoors about February 19–March 5 and move the seedlings out around April 23, after the last spring frost.
Never miss a window in Seymour
An email when it’s time to start seeds, transplant, and sow — timed to Seymour’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Columbus · 29 km
- Madison · 47 km
- Bedford · 53 km
- Greensburg · 56 km
- Bloomington · 60 km
- Sellersburg · 62 km
- Franklin · 63 km
- Shelbyville · 67 km
Frost dates recorded at SEYMOUR 2 N, 4 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 Seymour, IN — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00127935. Retrieved from https://blissgarden.com/indiana/seymour.