Last frost date in Portland, Oregon
February 25
Average last frost in spring. In an early year (1 in 10) it's over by January 24; in a late year (1 in 10) it comes after March 21.
December 1
Average first frost in fall. 1 year in 10 it comes by November 10.
Source: NOAA U.S. Climate Normals 1991–2020, station Portland Kgw-tv (USC00356749), 2.3 miles from Portland, elevation 159 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Jan 24 | Feb 25 | Mar 21 |
| First frost in fall | Nov 10 | Dec 1 | Dec 27 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 280
Planting calendar for Portland
Fall planting
USDA dates for places whose average first freeze is about November 30 (Portland: December 1).
- OkraJune 1 – Sept 20 (past for this year)
- SoybeansJune 1 – July 30 (past for this year)
- Summer squashJune 1 – Sept 1 (past for this year)
- Sweet potatoesJune 1 – July 1 (past for this year)
- Swiss chardJune 1 – Nov 1Now
- Peppers plantsJune 15 – Sept 1 (past for this year)
- Black-eyed peasJuly 1 – Sept 10 (past for this year)
- Eggplant plantsJuly 1 – Sept 1 (past for this year)
- CucumbersJuly 15 – Sept 15 (past for this year)
- Winter squashJuly 15 – Aug 15 (past for this year)
- Broccoli plantsAug 1 – Oct 1 (past for this year)
- Brussels sprouts plantsAug 1 – Oct 1 (past for this year)
- Celery and celeriac plantsAug 1 – Dec 1Now
- Lima beansAug 1 – Sept 15 (past for this year)
- PotatoesAug 1 – Sept 15 (past for this year)
- TomatoesAug 1 – Sept 1 (past for this year)
- Cauliflower plantsAug 15 – Oct 10 (past for this year)
- SalsifyAug 15 – Sept 30 (past for this year)
- ShallotsAug 15 – Oct 15 (past for this year)
- Snap beansAug 15 – Sept 20 (past for this year)
- Witloof chicoryAug 15 – Sept 30 (past for this year)
- BeetsSept 1 – Dec 15Now
- Cabbage plantsSept 1 – Dec 31Now
- Chinese cabbageSept 1 – Nov 1Now
- Collards plantsSept 1 – Dec 1Now
- EndiveSept 1 – Nov 15Now
- Florence fennelSept 1 – Nov 15Now
- GarlicSept 1 – Nov 15Now
- Head lettuce plantsSept 1 – Dec 1Now
- KaleSept 1 – Dec 1Now
- KohlrabiSept 1 – Dec 1Now
- Leaf lettuceSept 1 – Dec 1Now
- LeeksSept 1 – Nov 1Now
- Mustard greensSept 1 – Dec 1Now
- Onion seedSept 1 – Nov 1Now
- ParsleySept 1 – Dec 31Now
- ParsnipsSept 1 – Nov 15Now
- RadishesSept 1 – Dec 31Now
- RutabagaSept 1 – Nov 15Now
- SorrelSept 1 – Nov 15Now
- TurnipsSept 1 – Nov 15Now
- CarrotsSept 15 – Dec 1Now
- DandelionSept 15 – Dec 15Now
- Corn saladOct 1 – Dec 31Now
- Garden peasOct 1 – Dec 31Now
- Onion plants plantsOct 1 – Dec 31Now
- SpinachOct 1 – Dec 31Now
- Upland cressOct 1 – Dec 31Now
- Chervil and chivesNov 1 – Dec 31Soon
- Onion setsNov 1 – Dec 31Soon
USDA lists horseradish as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about February 28 (Portland: February 25).
- Corn saladJan 1 – Mar 1
- Leaf lettuceJan 1 – Mar 15
- Onion plants plantsJan 1 – Feb 1
- Onion seedJan 1 – Feb 15
- Onion setsJan 1 – Mar 1
- RadishesJan 1 – Apr 1
- RutabagaJan 1 – Feb 1
- ShallotsJan 1 – Mar 1
- SpinachJan 1 – Mar 1
- Cabbage plantsJan 15 – Feb 25
- Chervil and chivesJan 15 – Feb 15
- Collards plantsJan 15 – Mar 15
- DandelionJan 15 – Mar 1
- Garden peasJan 15 – Mar 1
- Head lettuce plantsJan 15 – Feb 15
- LeeksJan 15 – Feb 15
- ParsleyJan 15 – Mar 1
- ParsnipsJan 15 – Feb 15
- PotatoesJan 15 – Mar 1
- SalsifyJan 15 – Mar 1
- Cauliflower plantsJan 20 – Feb 20
- TurnipsJan 20 – Mar 1
- BeetsFeb 1 – Apr 15
- Broccoli plantsFeb 1 – Mar 1
- Brussels sprouts plantsFeb 1 – Mar 1
- CarrotsFeb 1 – Mar 1
- Celery and celeriac plantsFeb 1 – Mar 1
- EndiveFeb 1 – Mar 1
- Florence fennelFeb 1 – Mar 1
- KaleFeb 1 – 20
- KohlrabiFeb 1 – 20
- Mustard greensFeb 1 – Mar 1
- SorrelFeb 1 – Mar 10
- Swiss chardFeb 1 – May 1
- Upland cressFeb 1 – Mar 1
- Cantaloupe (muskmelon)Mar 1 – Apr 15
- CucumbersMar 1 – Apr 15
- Sweet cornMar 1 – Apr 15
- WatermelonMar 1 – Apr 15
- Black-eyed peasMar 10 – June 20
- Eggplant plantsMar 10 – Apr 15
- OkraMar 10 – June 1
- Snap beansMar 10 – May 15
- TomatoesMar 10 – May 1
- Lima beansMar 15 – June 1
- New Zealand spinachMar 15 – May 15
- Peppers plantsMar 15 – May 1
- Summer squashMar 15 – May 15
- SoybeansMar 20 – June 30
- Sweet potatoesMar 20 – June 1
USDA lists chinese cabbage, garlic as generally fall-planted here.
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.
Nearby in Oregon
- Milwaukie 7 mi · last frost Feb 25
- Lake Oswego 9 mi · last frost Mar 18
- Beaverton 9 mi · last frost Apr 1
- Happy Valley 10 mi · last frost Mar 18
- Tigard 10 mi · last frost Apr 1