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What to plant in December in Zone 4b

December falls between planting windows in Zone 4b. The last window closed around October 18 (Garlic). The next one opens around February 1 (Onions, Leeks, Parsley and 2 more). Use the gap to plan and order seed.

Zone 4b frost: last ~05/10, first ~09/30. Dates computed from these and cited extension rules. For your exact town, use the ZIP tool.

Coming up: February

See February in Zone 4b →

Just closed: October

See October in Zone 4b →

Choose supplies for your planting plan

Check the crop's sowing method first. Trays and seed-starting mix are for indoor starts; row cover can help protect outdoor seedlings. Reuse supplies you already have, and check product dimensions before ordering.

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← November   January →

Calendar computed 2026-10-07. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rules: UNH Extension, Johnny's, UGA Extension.