When to plant in Manchester, CT
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Manchester, Connecticut — is derived from the closest NOAA station with complete climate normals.
In zone 6b, Manchester gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
HARTFORD BRAINARD FLD · 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 Manchester’s own odds, recorded at HARTFORD BRAINARD FLD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 14 | Apr 30 | Apr 17 | Oct 2 | Oct 14 | Oct 29 |
| 32°F | May 1 | Apr 17 | Apr 1 | Oct 12 | Oct 26 | Nov 7 |
| 28°F | Apr 21 | Apr 3 | Mar 21 | Oct 22 | Nov 5 | Nov 20 |
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 Manchester, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Manchester planting FAQ
When is the last spring frost in Manchester, CT?
Manchester'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 Manchester, CT?
Expect Manchester's first fall frost near October 26 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Manchester in?
Manchester is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Manchester?
Manchester has about 192 frost-free days — a moderate growing season — between the average last spring frost (April 17) and first fall frost (October 26).
When should I plant tomatoes in Manchester?
For Manchester, 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 Manchester
An email when it’s time to start seeds, transplant, and sow — timed to Manchester’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- East Hartford · 8 km
- Hartford · 13 km
- Wethersfield · 15 km
- West Hartford · 20 km
- Windsor Locks · 20 km
- Newington · 20 km
- Storrs · 22 km
- New Britain · 25 km
Frost dates recorded at HARTFORD BRAINARD FLD, 12 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 Manchester, CT — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014752. Retrieved from https://blissgarden.com/connecticut/manchester.