Last Frost Date

Planting planner: Broken Arrow, Oklahoma

Typical last spring frost March 30 (1 spring in 10 later than April 17). Typical first fall frost November 4 (1 fall in 10 earlier than October 21). Growing season about 220 days.

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Frost likely Frost possible Frost unlikely Frost is likely until March 10 and fades out by April 17. It is unlikely from then until October 21, and likely again after November 20. The dashed lines are the typical dates, March 30 and November 4.

January

  • January 12 to February 9: Broccoli and cabbage (start seeds indoors)
  • January 26 to February 23: Cauliflower (start seeds indoors)

February

  • February 9 to March 2: Eggplant (start seeds indoors)
  • February 16 to March 2: Peppers (start seeds indoors)
  • February 23 to March 9: Tomatoes (start seeds indoors)

March

  • March 2 to 16: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
  • March 2 to 16: Broccoli and cabbage (plant out)
  • March 16 to 30: Beets, carrots, potatoes, Swiss chard (plant outdoors)
  • March 16 to 30: Cauliflower (plant out)
  • March 30: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)

April

  • April 13: Tomatoes, peppers, eggplant (plant out)
  • April 13: Melons, winter squash, pumpkins, lima beans (sow outdoors)

May

Nothing to start this month.

June

  • June 9 to 23: Cabbage for fall (start seeds)
  • June 29 to July 13: Broccoli for fall (start seeds)

July

Nothing to start this month.

August

  • August 8: Snap beans for fall (last date to sow)
  • August 12: Carrots for fall (last date to sow)
  • August 13: Cucumbers for fall (last date to sow)
  • August 17: Peas for fall (last date to sow)
  • August 18: Summer squash for fall (last date to sow)
  • August 22: Leaf lettuce and beets for fall (last date to sow)

September

  • September 1: Turnips and kohlrabi for fall (last date to sow)
  • September 11: Spinach for fall (last date to sow)
  • September 21: Radishes for fall (last date to sow)

October

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

November

  • November 21 to 28: Garlic (plant cloves)

December

Nothing to start this month.

Dates from NOAA's 1991 to 2020 climate normals for Tulsa R L Jones JR Airport (station USW00053908), 10 miles from the center of Broken Arrow. 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/oklahoma/broken-arrow/

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