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Planting calendar for ZIP 06226 (Willimantic, CT)

When to plant vegetables in Willimantic, CT (USDA hardiness zone 6b). Typical last spring frost around Apr 28, 2026 9 days year to year), first fall frost around Oct 13, 202611 days).

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

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

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Month by month in Willimantic, CT

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May

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August

Understand your frost dates

Frost dates for ZIP 06226: NOAA 1991-2020 normals (USW00054767 WILLIMANTIC WINDHAM AP, CT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.