When to plant in Greenfield, IN
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Greenfield, Indiana — is derived from the closest NOAA station with complete climate normals.
Zone 6a means Greenfield sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
GREENFIELD · 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 Greenfield’s own odds, recorded at GREENFIELD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | May 1 | Apr 16 | Sep 30 | Oct 12 | Oct 24 |
| 32°F | May 7 | Apr 19 | Apr 6 | Oct 9 | Oct 22 | Nov 1 |
| 28°F | Apr 23 | Apr 7 | Mar 24 | Oct 21 | Nov 1 | Nov 16 |
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 Greenfield, 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.
Greenfield planting FAQ
When is the last spring frost in Greenfield, IN?
On average, the last spring frost in Greenfield is around April 19 (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 Greenfield, IN?
Expect Greenfield's first fall frost near October 22 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Greenfield in?
Greenfield 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 Greenfield?
There are roughly 186 frost-free days in Greenfield (a moderate growing season), running from the average last frost around April 19 to the first fall frost near October 22.
When should I plant tomatoes in Greenfield?
In Greenfield, start tomato seeds indoors around February 22–March 8, then transplant seedlings outdoors around April 26 once the danger of frost has passed.
Never miss a window in Greenfield
An email when it’s time to start seeds, transplant, and sow — timed to Greenfield’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- McCordsville · 17 km
- Lawrence · 20 km
- Fishers · 25 km
- Shelbyville · 27 km
- Beech Grove · 28 km
- Indianapolis · 32 km
- Noblesville · 34 km
- Anderson · 34 km
Frost dates recorded at GREENFIELD, 1 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 Greenfield, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00123527. Retrieved from https://blissgarden.com/indiana/greenfield.