Last Frost Date

Planting planner: St. George, Utah

Typical last spring frost March 14 (1 spring in 10 later than April 6). Typical first fall frost November 10 (1 fall in 10 earlier than October 27). Growing season about 239 days.

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Frost likely Frost possible Frost unlikely Frost is likely until February 27 and fades out by April 6. It is unlikely from then until October 27, and likely again after November 22. The dashed lines are the typical dates, March 14 and November 10.

January

  • January 10 to February 7: Cauliflower (start seeds indoors)
  • January 24 to February 14: Eggplant (start seeds indoors)
  • January 31 to February 14: Peppers (start seeds indoors)

February

  • February 7 to 21: Tomatoes (start seeds indoors)
  • February 14 to 28: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
  • February 14 to 28: Broccoli and cabbage (plant out)
  • February 28 to March 14: Beets, carrots, potatoes, Swiss chard (plant outdoors)
  • February 28 to March 14: Cauliflower (plant out)

March

  • March 14: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)
  • March 28: Tomatoes, peppers, eggplant (plant out)
  • March 28: Melons, winter squash, pumpkins, lima beans (sow outdoors)

April

Nothing to start this month.

May

Nothing to start this month.

June

  • June 15 to 29: Cabbage for fall (start seeds)

July

  • July 5 to 19: Broccoli for fall (start seeds)

August

  • August 14: Snap beans for fall (last date to sow)
  • August 18: Carrots for fall (last date to sow)
  • August 19: Cucumbers for fall (last date to sow)
  • August 23: Peas for fall (last date to sow)
  • August 24: Summer squash for fall (last date to sow)
  • August 28: Leaf lettuce and beets for fall (last date to sow)

September

  • September 7: Turnips and kohlrabi for fall (last date to sow)
  • September 17: Spinach for fall (last date to sow)
  • September 27: Radishes for fall (last date to sow)

October

  • October 27: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)

November

  • November 27 to December 4: Garlic (plant cloves)

December

  • December 27 to January 24: Broccoli and cabbage (start seeds indoors)

Dates from NOAA's 1991 to 2020 climate normals for St George (station USC00427516), 3 miles from the center of St. George. 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/utah/st-george/

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