Zone 1a Almanac

What growers in zone 1a actually recorded

Every row below comes from real plantings and harvest logs kept by growers in zone 1a. Nothing is published until enough growers have recorded it, so the gaps are real gaps, not guesses.

Last frost: June 20

First frost: August 10

These two frost dates are the conventional zone-wide averages for zone 1a, not a reading from a station near you, so treat them as plus or minus about two weeks until you enter your own. Crop rows below are medians of member records, each published only after enough growers logged it. See the full method, sources, and confidence bands.

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See how your season compares

Log a planting and its harvests and Harvestead will tell you whether you came in ahead of or behind zone 1a, crop by crop.

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