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Glendora, CA planting calendar

When to plant vegetables in Glendora, CA (USDA hardiness zone 10a). Typical last spring frost around Jan 8, 2026 (±26 days year to year), first fall frost around Dec 28, 2026 (±23 days).

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

These dates are typical for the whole city. Enter your ZIP for frost dates from the station nearest you:

Still time to plant

As of today, these crops can still reach harvest before Glendora, CA’s first frost (~Dec 28, 2026) — fastest first.

Month by month in Glendora, CA

January

February

October

November

December

Understand your frost dates

More California planting calendars

ZIP codes in Glendora

91740, 91741

Where these dates come from

Frost dates for Glendora, CAare NOAA 1991–2020 climate normals from a station representative of the area, which covers 2 ZIP codes. Individual ZIP codes within it can run earlier or later.

Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.