Last Frost Date

Planting planner: Concord, New Hampshire

Typical last spring frost May 8 (1 spring in 10 later than May 22). Typical first fall frost October 3 (1 fall in 10 earlier than September 21). Growing season about 146 days.

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Frost likely Frost possible Frost unlikely Frost is likely until April 27 and fades out by May 22. It is unlikely from then until September 21, and likely again after October 16. The dashed lines are the typical dates, May 8 and October 3.

Your season is too short for a separate fall planting of cabbage and broccoli: sown late enough to be a fall crop, it wouldn't be ready before the typical first frost. Your spring planting is your harvest.

January

Nothing to start this month.

February

  • February 20 to March 20: Broccoli and cabbage (start seeds indoors)

March

  • March 6 to April 3: Cauliflower (start seeds indoors)
  • March 20 to April 10: Eggplant (start seeds indoors)
  • March 27 to April 10: Peppers (start seeds indoors)

April

  • April 3 to 17: Tomatoes (start seeds indoors)
  • April 10 to 24: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
  • April 10 to 24: Broccoli and cabbage (plant out)
  • April 24 to May 8: Beets, carrots, potatoes, Swiss chard (plant outdoors)
  • April 24 to May 8: Cauliflower (plant out)

May

  • May 8: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)
  • May 22: Tomatoes, peppers, eggplant (plant out)
  • May 22: Melons, winter squash, pumpkins, lima beans (sow outdoors)

June

Nothing to start this month.

July

  • July 7: Snap beans for fall (last date to sow)
  • July 11: Carrots for fall (last date to sow)
  • July 12: Cucumbers for fall (last date to sow)
  • July 16: Peas for fall (last date to sow)
  • July 17: Summer squash for fall (last date to sow)
  • July 21: Leaf lettuce and beets for fall (last date to sow)
  • July 31: Turnips and kohlrabi for fall (last date to sow)

August

  • August 10: Spinach for fall (last date to sow)
  • August 20: Radishes for fall (last date to sow)

September

  • September 21: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)

October

  • October 20 to 27: Garlic (plant cloves)

November

Nothing to start this month.

December

Nothing to start this month.

Dates from NOAA's 1991 to 2020 climate normals for Concord Municipal Airport (station USW00014745), 4 miles from the center of Concord. Planting rules: Colorado State University Extension GardenNotes #720 (spring), Virginia Cooperative Extension 426-334 (fall crops), University of Minnesota Extension (garlic). Spring bulbs: plant when the soil has cooled to about 50 to 55°F, until a couple of weeks before the ground freezes (University of Wisconsin–Madison Extension). Full details: https://lastfrostdate.com/frost-dates/new-hampshire/concord/

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