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Planting calendar for ZIP 17050 (Mechanicsburg, PA)

When to plant vegetables in Mechanicsburg, PA (USDA hardiness zone 7a). Typical last spring frost around Apr 15, 2026 12 days year to year), first fall frost around Oct 23, 202612 days).

Playing it safe? Spring frost holds off until about Apr 30, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Mechanicsburg, PA

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August

Understand your frost dates

Frost dates for ZIP 17050: NOAA 1991-2020 normals (USC00363698 HARRISBURG 1 NE, PA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.