When to plant Leeks in Washington
In spring, from Jan 15 – Feb 15 in Burien to May 1 – 15 in Cheney.
In fall, from May 1 – June 1 in Cheney to Sept 1 – Nov 1 in Woodinville.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Aberdeen | Feb 15 – Mar 15 | Spring-planted |
| Airway Heights | Apr 1 – May 1 | Spring-planted |
| Anacortes | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Arlington | Mar 15 – Apr 15 | Spring-planted |
| Auburn | Feb 1 – Mar 1 | Spring-planted |
| Bainbridge Island | Feb 15 – Mar 15 | Spring-planted |
| Battle Ground | Apr 1 – May 1 | Spring-planted |
| Bellevue | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Bellingham | Feb 15 – Mar 15 | Spring-planted |
| Bonney Lake | Mar 1 – Apr 1 | Spring-planted |
| Bothell | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Bremerton | Feb 15 – Mar 15 | Spring-planted |
| Burien | Jan 15 – Feb 15 | Sept 1 – Nov 1Now |
| Burlington | Feb 1 – Mar 1 | Spring-planted |
| Camas | Feb 1 – Mar 1 | Sept 1 – Nov 1Now |
| Centralia | Mar 15 – Apr 15 | Spring-planted |
| Cheney | May 1 – 15 | May 1 – June 1 |
| Covington | Mar 15 – Apr 15 | Spring-planted |
| Des Moines | Jan 15 – Feb 15 | Sept 1 – Nov 1Now |
| East Wenatchee | Feb 15 – Mar 15 | Spring-planted |
| Edgewood | Jan 25 – Mar 1 | Spring-planted |
| Edmonds | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Ellensburg | Apr 15 – May 15 | Spring-planted |
| Enumclaw | Mar 1 – Apr 1 | Spring-planted |
| Everett | Feb 1 – Mar 1 | Spring-planted |
| Federal Way | Jan 25 – Mar 1 | Spring-planted |
| Ferndale | Feb 15 – Mar 15 | Spring-planted |
| Fife | Jan 25 – Mar 1 | Spring-planted |
| Gig Harbor | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Grandview | Apr 1 – May 1 | Spring-planted |
| Issaquah | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Kelso | Mar 1 – Apr 1 | Spring-planted |
| Kenmore | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Kennewick | Feb 15 – Mar 15 | Spring-planted |
| Kent | Feb 1 – Mar 1 | Spring-planted |
| Kirkland | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Lacey | Apr 1 – May 1 | Spring-planted |
| Lake Forest Park | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Lake Stevens | Feb 1 – Mar 1 | Spring-planted |
| Lakewood | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Liberty Lake | Apr 1 – May 1 | Spring-planted |
| Longview | Mar 1 – Apr 1 | Spring-planted |
| Lynden | Mar 15 – Apr 15 | Spring-planted |
| Lynnwood | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Maple Valley | Mar 15 – Apr 15 | Spring-planted |
| Marysville | Feb 1 – Mar 1 | Spring-planted |
| Mercer Island | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Mill Creek | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Monroe | Mar 15 – Apr 15 | Spring-planted |
| Moses Lake | Apr 1 – May 1 | Spring-planted |
| Mount Vernon | Feb 1 – Mar 1 | Spring-planted |
| Mountlake Terrace | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Mukilteo | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Newcastle | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Oak Harbor | Jan 25 – Mar 1 | Spring-planted |
| Olympia | Apr 1 – May 1 | Spring-planted |
| Pasco | Apr 1 – May 1 | Spring-planted |
| Port Angeles | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Port Orchard | Feb 15 – Mar 15 | Spring-planted |
| Port Townsend | Jan 15 – Feb 15 | Sept 1 – Nov 1Now |
| Poulsbo | Feb 15 – Mar 15 | Spring-planted |
| Pullman | Apr 15 – May 15 | Spring-planted |
| Puyallup | Mar 1 – Apr 1 | Spring-planted |
| Redmond | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Renton | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Richland | Mar 1 – Apr 1 | Spring-planted |
| Ridgefield | Apr 1 – May 1 | Spring-planted |
| Sammamish | Feb 15 – Mar 15 | Spring-planted |
| SeaTac | Jan 15 – Feb 15 | Sept 1 – Nov 1Now |
| Seattle | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Sedro-Woolley | Feb 15 – Mar 15 | Spring-planted |
| Shelton | Apr 1 – May 1 | Spring-planted |
| Shoreline | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Snohomish | Feb 1 – Mar 1 | Spring-planted |
| Snoqualmie | Feb 15 – Mar 15 | Spring-planted |
| Spokane | Apr 1 – May 1 | Spring-planted |
| Spokane Valley | Apr 1 – May 1 | Spring-planted |
| Sumner | Mar 1 – Apr 1 | Spring-planted |
| Sunnyside | Apr 1 – May 1 | Spring-planted |
| Tacoma | Jan 25 – Mar 1 | Spring-planted |
| Tukwila | Jan 15 – Feb 15 | Sept 1 – Nov 1Now |
| Tumwater | Apr 1 – May 1 | Spring-planted |
| University Place | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Vancouver | Feb 15 – Mar 15 | Spring-planted |
| Walla Walla | Feb 15 – Mar 15 | Spring-planted |
| Washougal | Feb 15 – Mar 15 | Sept 1 – Nov 1Now |
| Wenatchee | Feb 15 – Mar 15 | Spring-planted |
| West Richland | Mar 1 – Apr 1 | Spring-planted |
| Woodinville | Jan 25 – Mar 1 | Sept 1 – Nov 1Now |
| Yakima | Mar 1 – Apr 1 | Spring-planted |
| Yelm | Apr 1 – May 1 | Spring-planted |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for leeks.