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Planting calendar for ZIP 06378 (Stonington, CT)

When to plant vegetables in Stonington, CT (USDA hardiness zone 7a). Typical last spring frost around Apr 11, 2026 10 days year to year), first fall frost around Oct 31, 202611 days).

Playing it safe? Spring frost holds off until about Apr 23, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Stonington, CT

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September

Understand your frost dates

Frost dates for ZIP 06378: NOAA 1991-2020 normals (USW00014794 WESTERLY STATE AP, RI US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.