Zone 3a planting calendar

What to plant in January: zone 3a

Zone 3a averages its last spring frost around May 30 and its first fall frost around September 10. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.

Last frost: May 30

First frost: September 10

Winter lows: -40 to -35 °F

Zone 3a Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

A quiet month in zone 3a

January 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 February.

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