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Planting calendar for ZIP 15924 (Cairnbrook, PA)

When to plant vegetables in Cairnbrook, PA (USDA hardiness zone 6a). Typical last spring frost around May 4, 2026 13 days year to year), first fall frost around Oct 10, 202610 days).

Playing it safe? Spring frost holds off until about May 20, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Cairnbrook, PA planting calendar for dates typical of the whole city.

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Month by month in Cairnbrook, PA

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August

Understand your frost dates

Frost dates for ZIP 15924: NOAA 1991-2020 normals (USC00368011 SHAWNEE SP, PA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.