Last Frost Date

Planting planner: Spokane, Washington

Typical last spring frost April 26 (1 spring in 10 later than May 10). Typical first fall frost October 15 (1 fall in 10 earlier than September 30). Growing season about 170 days.

Or use your browser's Print command.

Frost likely Frost possible Frost unlikely Frost is likely until April 10 and fades out by May 10. It is unlikely from then until September 30, and likely again after October 31. The dashed lines are the typical dates, April 26 and October 15.

January

Nothing to start this month.

February

  • February 8 to March 8: Broccoli and cabbage (start seeds indoors)
  • February 22 to March 22: Cauliflower (start seeds indoors)

March

  • March 8 to 29: Eggplant (start seeds indoors)
  • March 15 to 29: Peppers (start seeds indoors)
  • March 22 to April 5: Tomatoes (start seeds indoors)
  • March 29 to April 12: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
  • March 29 to April 12: Broccoli and cabbage (plant out)

April

  • April 12 to 26: Beets, carrots, potatoes, Swiss chard (plant outdoors)
  • April 12 to 26: Cauliflower (plant out)
  • April 26: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)

May

  • May 10: Tomatoes, peppers, eggplant (plant out)
  • May 10: Melons, winter squash, pumpkins, lima beans (sow outdoors)
  • May 20 to June 3: Cabbage for fall (start seeds)

June

  • June 9 to 23: Broccoli for fall (start seeds)

July

  • July 19: Snap beans for fall (last date to sow)
  • July 23: Carrots for fall (last date to sow)
  • July 24: Cucumbers for fall (last date to sow)
  • July 28: Peas for fall (last date to sow)
  • July 29: Summer squash for fall (last date to sow)

August

  • August 2: Leaf lettuce and beets for fall (last date to sow)
  • August 12: Turnips and kohlrabi for fall (last date to sow)
  • August 22: Spinach for fall (last date to sow)

September

  • September 1: Radishes for fall (last date to sow)
  • September 30: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)

October

Nothing to start this month.

November

  • November 3 to 10: Garlic (plant cloves)

December

Nothing to start this month.

Dates from NOAA's 1991 to 2020 climate normals for Spokane Felts Field (station USW00094176), 5 miles from the center of Spokane. 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/washington/spokane/

Back to frost dates for Spokane