When to plant in Westfield, IN
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Westfield, Indiana — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Westfield gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Westfield is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
CARMEL 3 E · 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 Westfield’s own odds, recorded at CARMEL 3 E.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | May 2 | Apr 17 | Sep 28 | Oct 11 | Oct 24 |
| 32°F | May 8 | Apr 21 | Apr 5 | Oct 6 | Oct 21 | Nov 2 |
| 28°F | Apr 26 | Apr 8 | Mar 25 | Oct 18 | Nov 1 | Nov 17 |
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 Westfield, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 19 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.
Westfield planting FAQ
When is the last spring frost in Westfield, IN?
On average, the last spring frost in Westfield is around April 21 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Westfield, IN?
In Westfield, 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 Westfield in?
Westfield 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 Westfield?
Westfield has about 183 frost-free days — a moderate growing season — between the average last spring frost (April 21) and first fall frost (October 21).
When should I plant tomatoes in Westfield?
For Westfield, sow tomatoes indoors about February 24–March 10 and move the seedlings out around April 28, after the last spring frost.
Never miss a window in Westfield
An email when it’s time to start seeds, transplant, and sow — timed to Westfield’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Carmel · 8 km
- Noblesville · 13 km
- Zionsville · 15 km
- Fishers · 18 km
- Whitestown · 20 km
- Lawrence · 23 km
- McCordsville · 25 km
- Lebanon · 26 km
Frost dates recorded at CARMEL 3 E, 11 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 Westfield, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00121303. Retrieved from https://blissgarden.com/indiana/westfield.