When to plant in Lebanon, IN
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Lebanon, Indiana — all computed from Lebanon's nearest NOAA weather station.
Zone 6a means Lebanon sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
WHITESTOWN · 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 Lebanon’s own odds, recorded at WHITESTOWN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | May 1 | Apr 18 | Sep 25 | Oct 8 | Oct 21 |
| 32°F | May 6 | Apr 21 | Apr 6 | Oct 5 | Oct 20 | Nov 1 |
| 28°F | Apr 25 | Apr 9 | Mar 25 | Oct 16 | Oct 31 | Nov 13 |
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 Lebanon, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 27 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.
Lebanon planting FAQ
When is the last spring frost in Lebanon, IN?
Plan for the last spring frost in Lebanon around April 21 (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 Lebanon, IN?
In Lebanon, the first 32°F freeze of fall lands around October 20 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Lebanon in?
Lebanon 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 Lebanon?
There are roughly 182 frost-free days in Lebanon (a moderate growing season), running from the average last frost around April 21 to the first fall frost near October 20.
When should I plant tomatoes in Lebanon?
In Lebanon, start tomato seeds indoors around February 24–March 10, then transplant seedlings outdoors around April 28 once the danger of frost has passed.
Never miss a window in Lebanon
An email when it’s time to start seeds, transplant, and sow — timed to Lebanon’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Whitestown · 10 km
- Zionsville · 13 km
- Brownsburg · 23 km
- Westfield · 26 km
- Carmel · 28 km
- Frankfort · 28 km
- Danville · 31 km
- Avon · 31 km
Frost dates recorded at WHITESTOWN, 10 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 Lebanon, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00129557. Retrieved from https://blissgarden.com/indiana/lebanon.