When to plant in Milford, CT
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Milford, Connecticut — all computed from Milford's nearest NOAA weather station.
Zone 7a means many perennials and even some tender shrubs overwinter in Milford, while your frost dates still decide when annuals go out.
Frost probability
BRIDGEPORT SIKORSKY MEM 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 Milford’s own odds, recorded at BRIDGEPORT SIKORSKY MEM AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 29 | Apr 16 | Apr 6 | Oct 11 | Oct 26 | Nov 8 |
| 32°F | Apr 17 | Apr 5 | Mar 25 | Oct 25 | Nov 6 | Nov 20 |
| 28°F | Apr 6 | Mar 26 | Mar 11 | Nov 6 | Nov 19 | Dec 5 |
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 Milford, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Milford planting FAQ
When is the last spring frost in Milford, CT?
Plan for the last spring frost in Milford around April 5 (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 Milford, CT?
Expect Milford's first fall frost near November 6 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Milford in?
Milford 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 Milford?
There are roughly 215 frost-free days in Milford (a long growing season), running from the average last frost around April 5 to the first fall frost near November 6.
When should I plant tomatoes in Milford?
In Milford, start tomato seeds indoors around February 8–February 22, then transplant seedlings outdoors around April 12 once the danger of frost has passed.
Never miss a window in Milford
An email when it’s time to start seeds, transplant, and sow — timed to Milford’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Orange · 8 km
- West Haven · 10 km
- Trumbull Center · 10 km
- Shelton · 11 km
- Derby · 11 km
- Bridgeport · 12 km
- Ansonia · 13 km
- New Haven · 15 km
Frost dates recorded at BRIDGEPORT SIKORSKY MEM AP, 9 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 Milford, CT — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094702. Retrieved from https://blissgarden.com/connecticut/milford.