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Planting calendar for ZIP 06255 (North Grosvenordale, CT)

When to plant vegetables in North Grosvenordale, CT (USDA hardiness zone 6a). Typical last spring frost around May 1, 2026 11 days year to year), first fall frost around Oct 9, 202610 days).

Playing it safe? Spring frost holds off until about May 15, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full North Grosvenordale, CT planting calendar for dates typical of the whole city.

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Month by month in North Grosvenordale, CT

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May

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August

Understand your frost dates

Frost dates for ZIP 06255: NOAA 1991-2020 normals (USC00069388 W THOMPSON LAKE, CT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.