Zone 1a planting calendar
What to plant in December: zone 1a
A rule-of-thumb starting point for zone 1a: last spring frost around June 20, first fall frost around August 10. Zones are set by winter lows, not frost dates, so two gardens in the same zone can be weeks apart. Measure your ZIP below for dates from your area's own 30-year record.
Typical last frost: June 20
Typical first frost: August 10
Winter lows: -60 to -55 °F
A quiet month in zone 1a
December is a rest-and-plan month here. Use it to order seed, test your soil, repair beds, and map next season's rotation, then jump ahead to January.
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