Zone 2b planting calendar
What to plant in September: zone 2b
A rule-of-thumb starting point for zone 2b: last spring frost around May 31, first fall frost around August 25. 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: May 31
Typical first frost: August 25
Winter lows: -45 to -40 °F
A quiet month in zone 2b
September 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 October.
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