When to plant in Carmel, IN
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Carmel, Indiana — is derived from the closest NOAA station with complete climate normals.
Zone 6a means Carmel sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in Carmel 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 Carmel’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 Carmel, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Carmel planting FAQ
When is the last spring frost in Carmel, IN?
Carmel's average last spring frost falls near April 21 — 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 Carmel, IN?
Expect Carmel's first fall frost near October 21 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Carmel in?
Carmel 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 Carmel?
There are roughly 183 frost-free days in Carmel (a moderate growing season), running from the average last frost around April 21 to the first fall frost near October 21.
When should I plant tomatoes in Carmel?
In Carmel, 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 Carmel
An email when it’s time to start seeds, transplant, and sow — timed to Carmel’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Westfield · 8 km
- Noblesville · 15 km
- Zionsville · 15 km
- Fishers · 15 km
- Lawrence · 17 km
- Whitestown · 19 km
- Speedway · 21 km
- Indianapolis · 21 km
Frost dates recorded at CARMEL 3 E, 8 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 Carmel, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00121303. Retrieved from https://blissgarden.com/indiana/carmel.