When to plant in Jasper, IN
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Jasper, Indiana — is derived from the closest NOAA station with complete climate normals.
These dates come from a station roughly 21 km away, the closest with full normals; terrain around Jasper (elevation, water, pavement) can move your real frost dates a few days either way. In zone 6b, Jasper gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
PATOKA LAKE · 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 Jasper’s own odds, recorded at PATOKA LAKE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 6 | Apr 21 | Apr 8 | Oct 8 | Oct 22 | Nov 3 |
| 32°F | Apr 26 | Apr 10 | Mar 27 | Oct 20 | Nov 1 | Nov 14 |
| 28°F | Apr 15 | Mar 30 | Mar 13 | Nov 1 | Nov 11 | Nov 28 |
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 Jasper, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Jasper planting FAQ
When is the last spring frost in Jasper, IN?
Jasper's average last spring frost falls near April 10 — 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 Jasper, IN?
The first fall frost in Jasper typically arrives around November 1 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Jasper in?
Jasper 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 Jasper?
Jasper has about 205 frost-free days — a moderate growing season — between the average last spring frost (April 10) and first fall frost (November 1).
When should I plant tomatoes in Jasper?
For Jasper, sow tomatoes indoors about February 13–February 27 and move the seedlings out around April 17, after the last spring frost.
Never miss a window in Jasper
An email when it’s time to start seeds, transplant, and sow — timed to Jasper’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Washington · 35 km
- Vincennes · 59 km
- Bedford · 65 km
- Evansville · 69 km
- Owensboro · 72 km
- Henderson · 83 km
- Bloomington · 93 km
- New Albany · 98 km
Frost dates recorded at PATOKA LAKE, 21 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 Jasper, IN — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00126711. Retrieved from https://blissgarden.com/indiana/jasper.