Last frost date in Seattle, Washington
March 8
Average last frost in spring. In an early year (1 in 10) it's over by February 13; in a late year (1 in 10) it comes after March 29.
November 23
Average first frost in fall. 1 year in 10 it comes by November 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Seattle Sand Pt Wsfo (USW00094290), 6.5 miles from Seattle, elevation 60 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Feb 13 | Mar 8 | Mar 29 |
| First frost in fall | Nov 4 | Nov 23 | Dec 16 |
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: 259
Planting calendar for Seattle
Fall planting
USDA dates for places whose average first freeze is about November 20 (Seattle: November 23).
- CucumbersJune 1 – Aug 15 (past for this year)
- Eggplant plantsJune 1 – Aug 1 (past for this year)
- New Zealand spinachJune 1 – Aug 15 (past for this year)
- OkraJune 1 – Sept 10 (past for this year)
- Peppers plantsJune 1 – Aug 15 (past for this year)
- SoybeansJune 1 – July 30 (past for this year)
- Summer squashJune 1 – Aug 20 (past for this year)
- Sweet cornJune 1 – Sept 1 (past for this year)
- Sweet potatoesJune 1 – July 1 (past for this year)
- Swiss chardJune 1 – Oct 1 (past for this year)
- TomatoesJune 1 – Aug 1 (past for this year)
- Black-eyed peasJuly 1 – Sept 1 (past for this year)
- Snap beansJuly 1 – Sept 10 (past for this year)
- Winter squashJuly 1 – Aug 1 (past for this year)
- Celery and celeriac plantsJuly 15 – Sept 1 (past for this year)
- Lima beansJuly 15 – Sept 1 (past for this year)
- SalsifyJuly 15 – Aug 15 (past for this year)
- Witloof chicoryJuly 20 – Sept 1 (past for this year)
- Broccoli plantsAug 1 – Sept 15 (past for this year)
- Brussels sprouts plantsAug 1 – Sept 15 (past for this year)
- Cauliflower plantsAug 1 – Sept 15 (past for this year)
- ParsnipsAug 1 – Sept 1 (past for this year)
- RutabagaAug 1 – Sept 1 (past for this year)
- PotatoesAug 10 – Sept 15 (past for this year)
- Florence fennelAug 15 – Sept 15 (past for this year)
- GarlicAug 15 – Oct 1 (past for this year)
- KaleAug 15 – Oct 15 (past for this year)
- ShallotsAug 15 – Oct 1 (past for this year)
- SorrelAug 15 – Oct 15 (past for this year)
- Collards plantsAug 25 – Nov 1Now
- BeetsSept 1 – Dec 1Now
- Cabbage plantsSept 1 – Dec 1Now
- CarrotsSept 1 – Nov 1Now
- Chinese cabbageSept 1 – Oct 15 (past for this year)
- DandelionSept 1 – Nov 1Now
- EndiveSept 1 – Oct 1 (past for this year)
- Head lettuce plantsSept 1 – Nov 1Now
- KohlrabiSept 1 – Oct 15 (past for this year)
- Leaf lettuceSept 1 – Nov 1Now
- LeeksSept 1 – Nov 1Now
- Mustard greensSept 1 – Dec 1Now
- Onion seedSept 1 – Nov 1Now
- ParsleySept 1 – Dec 31Now
- RadishesSept 1 – Dec 1Now
- TurnipsSept 1 – Nov 15Now
- Corn saladOct 1 – Dec 1Now
- Garden peasOct 1 – Dec 1Now
- Onion plants plantsOct 1 – Dec 31Now
- SpinachOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- 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 March 10 (Seattle: March 8).
- Asparagus plantsJan 1 – Mar 1
- Corn saladJan 1 – Mar 15
- RadishesJan 1 – Apr 15
- Garden peasJan 15 – Mar 15
- Leaf lettuceJan 15 – Apr 1
- Onion plants plantsJan 15 – Feb 15
- Onion setsJan 15 – Mar 10
- ParsnipsJan 15 – Mar 1
- RutabagaJan 15 – Feb 15
- ShallotsJan 15 – Mar 1
- SpinachJan 15 – Mar 10
- Cabbage plantsJan 25 – Mar 1
- LeeksJan 25 – Mar 1
- Cauliflower plantsFeb 1 – Mar 1
- Chervil and chivesFeb 1 – Mar 1
- Collards plantsFeb 1 – Apr 1
- DandelionFeb 1 – Mar 1
- Head lettuce plantsFeb 1 – 20
- Onion seedFeb 1 – Mar 1
- ParsleyFeb 1 – Mar 10
- PotatoesFeb 1 – Mar 1
- SalsifyFeb 1 – Mar 1
- TurnipsFeb 1 – Mar 1
- CarrotsFeb 10 – Mar 15
- KaleFeb 10 – Mar 1
- KohlrabiFeb 10 – Mar 1
- Mustard greensFeb 10 – Mar 15
- SorrelFeb 10 – Mar 15
- Upland cressFeb 10 – Mar 15
- BeetsFeb 15 – June 1
- Broccoli plantsFeb 15 – Mar 15
- Brussels sprouts plantsFeb 15 – Mar 15
- EndiveFeb 15 – Mar 15
- Florence fennelFeb 15 – Mar 15
- Swiss chardFeb 15 – May 15
- Celery and celeriac plantsFeb 20 – Mar 20
- Sweet cornMar 10 – Apr 15
- Black-eyed peasMar 15 – July 1
- Cantaloupe (muskmelon)Mar 15 – Apr 15
- CucumbersMar 15 – Apr 15
- Eggplant plantsMar 15 – Apr 15
- Snap beansMar 15 – May 15
- Summer squashMar 15 – May 1
- WatermelonMar 15 – Apr 15
- Lima beansMar 20 – June 1
- New Zealand spinachMar 20 – May 15
- OkraMar 20 – June 1
- TomatoesMar 20 – May 10
- Peppers plantsApr 1 – June 1
- Sweet potatoesApr 1 – June 1
- SoybeansApr 10 – June 30
- Witloof chicoryJune 1 – July 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 Washington
- Mercer Island 7 mi · last frost Mar 13
- Bainbridge Island 7 mi · last frost Mar 29
- Kirkland 9 mi · last frost Mar 8
- Bellevue 9 mi · last frost Mar 8
- Shoreline 10 mi · last frost Mar 8