When to plant in Norwich, CT
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Norwich, Connecticut — is derived from the closest NOAA station with complete climate normals.
In zone 6b, Norwich gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Norwich is now 11 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
NORWICH PUBLIC UTILITY PLT · 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 Norwich’s own odds, recorded at NORWICH PUBLIC UTILITY PLT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 13 | Apr 30 | Apr 16 | Oct 1 | Oct 12 | Oct 29 |
| 32°F | Apr 30 | Apr 14 | Apr 1 | Oct 9 | Oct 24 | Nov 7 |
| 28°F | Apr 16 | Apr 1 | Mar 18 | Oct 19 | Nov 5 | 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 Norwich, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Norwich planting FAQ
When is the last spring frost in Norwich, CT?
Plan for the last spring frost in Norwich around April 14 (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 Norwich, CT?
Expect Norwich's first fall frost near October 24 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Norwich in?
Norwich 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 Norwich?
Norwich has about 193 frost-free days — a moderate growing season — between the average last spring frost (April 14) and first fall frost (October 24).
When should I plant tomatoes in Norwich?
For Norwich, sow tomatoes indoors about February 17–March 3 and move the seedlings out around April 21, after the last spring frost.
Never miss a window in Norwich
An email when it’s time to start seeds, transplant, and sow — timed to Norwich’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Willimantic · 21 km
- New London · 24 km
- Westerly · 31 km
- Storrs · 32 km
- Manchester · 44 km
- Middletown · 47 km
- East Hartford · 49 km
- Wethersfield · 51 km
Frost dates recorded at NORWICH PUBLIC UTILITY PLT, 3 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 Norwich, CT — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00065910. Retrieved from https://blissgarden.com/connecticut/norwich.