When to plant in East Haven, CT
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in East Haven, Connecticut — is derived from the closest NOAA station with complete climate normals.
In zone 7a, East Haven supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
NEW HAVEN TWEED AP · 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 East Haven’s own odds, recorded at NEW HAVEN TWEED AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 30 | Apr 17 | Oct 4 | Oct 15 | Nov 1 |
| 32°F | May 1 | Apr 17 | Apr 2 | Oct 11 | Oct 27 | Nov 8 |
| 28°F | Apr 18 | Apr 4 | Mar 22 | Oct 22 | Nov 6 | Nov 21 |
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 East Haven, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
East Haven planting FAQ
When is the last spring frost in East Haven, CT?
East Haven's average last spring frost falls near April 17 — 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 East Haven, CT?
The first fall frost in East Haven typically arrives around October 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is East Haven in?
East Haven is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in East Haven?
East Haven has about 193 frost-free days — a moderate growing season — between the average last spring frost (April 17) and first fall frost (October 27).
When should I plant tomatoes in East Haven?
For East Haven, sow tomatoes indoors about February 20–March 6 and move the seedlings out around April 24, after the last spring frost.
Never miss a window in East Haven
An email when it’s time to start seeds, transplant, and sow — timed to East Haven’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- New Haven · 6 km
- West Haven · 9 km
- North Haven · 10 km
- Orange · 14 km
- Wallingford Center · 18 km
- Ansonia · 18 km
- Milford · 19 km
- Derby · 19 km
Frost dates recorded at NEW HAVEN TWEED AP, 4 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 East Haven, CT — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014758. Retrieved from https://blissgarden.com/connecticut/east-haven.