Planting planner: Gresham, Oregon
Typical last spring frost March 16 (1 spring in 10 later than April 12). Typical first fall frost November 20 (1 fall in 10 earlier than October 30). Growing season about 250 days.
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We don't give a garlic date here. The rule we use, from the University of Minnesota Extension, counts from the first killing frost, and it works where a hard freeze comes every year before the ground freezes. Your county's extension office can tell you when to plant garlic in your climate.
January
- January 12 to February 9: Cauliflower (start seeds indoors)
- January 26 to February 16: Eggplant (start seeds indoors)
February
- February 2 to 16: Peppers (start seeds indoors)
- February 9 to 23: Tomatoes (start seeds indoors)
- February 16 to March 2: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
- February 16 to March 2: Broccoli and cabbage (plant out)
March
- March 2 to 16: Beets, carrots, potatoes, Swiss chard (plant outdoors)
- March 2 to 16: Cauliflower (plant out)
- March 16: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)
- March 30: Tomatoes, peppers, eggplant (plant out)
- March 30: Melons, winter squash, pumpkins, lima beans (sow outdoors)
April
Nothing to start this month.
May
Nothing to start this month.
June
- June 25 to July 9: Cabbage for fall (start seeds)
July
- July 15 to 29: Broccoli for fall (start seeds)
August
- August 24: Snap beans for fall (last date to sow)
- August 28: Carrots for fall (last date to sow)
- August 29: Cucumbers for fall (last date to sow)
September
- September 2: Peas for fall (last date to sow)
- September 3: Summer squash for fall (last date to sow)
- September 7: Leaf lettuce and beets for fall (last date to sow)
- September 17: Turnips and kohlrabi for fall (last date to sow)
- September 27: Spinach for fall (last date to sow)
October
- October 7: Radishes for fall (last date to sow)
- October 30: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)
November
Nothing to start this month.
December
- December 29 to January 26: Broccoli and cabbage (start seeds indoors)
Dates from NOAA's 1991 to 2020 climate normals for Portland Troutdale Airport (station USW00024242), 4 miles from the center of Gresham. 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/oregon/gresham/