Last Frost Date

Planting planner: Trenton, New Jersey

Typical last spring frost April 10 (1 spring in 10 later than April 25). Typical first fall frost November 1 (1 fall in 10 earlier than October 15). Growing season about 202 days.

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Frost likely Frost possible Frost unlikely Frost is likely until March 30 and fades out by April 25. It is unlikely from then until October 15, and likely again after November 13. The dashed lines are the typical dates, April 10 and November 1.

January

  • January 23 to February 20: Broccoli and cabbage (start seeds indoors)

February

  • February 6 to March 6: Cauliflower (start seeds indoors)
  • February 20 to March 13: Eggplant (start seeds indoors)
  • February 27 to March 13: Peppers (start seeds indoors)

March

  • March 6 to 20: Tomatoes (start seeds indoors)
  • March 13 to 27: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
  • March 13 to 27: Broccoli and cabbage (plant out)
  • March 27 to April 10: Beets, carrots, potatoes, Swiss chard (plant outdoors)
  • March 27 to April 10: Cauliflower (plant out)

April

  • April 10: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)
  • April 24: Tomatoes, peppers, eggplant (plant out)
  • April 24: Melons, winter squash, pumpkins, lima beans (sow outdoors)

May

Nothing to start this month.

June

  • June 6 to 20: Cabbage for fall (start seeds)
  • June 26 to July 10: Broccoli for fall (start seeds)

July

Nothing to start this month.

August

  • August 5: Snap beans for fall (last date to sow)
  • August 9: Carrots for fall (last date to sow)
  • August 10: Cucumbers for fall (last date to sow)
  • August 14: Peas for fall (last date to sow)
  • August 15: Summer squash for fall (last date to sow)
  • August 19: Leaf lettuce and beets for fall (last date to sow)
  • August 29: Turnips and kohlrabi for fall (last date to sow)

September

  • September 8: Spinach for fall (last date to sow)
  • September 18: Radishes for fall (last date to sow)

October

  • October 15: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)

November

  • November 19 to 26: Garlic (plant cloves)

December

Nothing to start this month.

Dates from NOAA's 1991 to 2020 climate normals for Trenton Mercer Co Airport (station USW00014792), 5 miles from the center of Trenton. 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-jersey/trenton/

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