Zone 2b planting calendar

What to plant in March: zone 2b

Zone 2b averages its last spring frost around May 31 and its first fall frost around August 25. 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 31
First frost: August 25
Winter lows: -45 to -40 °F
Zone 2b Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Dormant care

  • Sharpen and oil toolsaround Mar 1

    Clean, sharpen and oil blades while there's time. Dull tools bruise plants and slow you down.

  • Prune dormant fruit treesaround Mar 15

    Prune apples, pears and peaches while fully dormant. Open the center, remove crossing wood.

Start indoors

  • Sow microgreens indoorsaround Mar 8

    A tray on the windowsill gives you a cut of fresh greens every 10-14 days through the cold months.

  • Start onions and leeks indoorsaround Mar 22

    Alliums need 10-12 weeks under lights before they go out. The earliest sowing of the year.

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