WhenPlant

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What to plant in December in Zone 5a

In December, no sowing or transplanting tasks land for Zone 5a from our current crop list — it's typically too cold to sow outdoors; plan and order seeds.

Zone 5a frost: last ~05/12, first ~10/01. Dates computed from these and cited extension rules. For your exact town, use the ZIP tool.

Nothing to sow outdoors this month in Zone 5a. Browse the full-year calendar to see what's next.

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Last verified 2026-07-16. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rules: UNH Extension, Johnny's, UGA Extension.