Washington planting zones & frost dates
USDA hardiness zones in Washington go from 6b to 9a. Pick your city for its average frost dates and a planting calendar, or search by ZIP code.
| City | Zone | Avg. last frost | Avg. first frost |
|---|---|---|---|
| Aberdeen | 8b | Mar 29 | Nov 15 |
| Anacortes | 8b | Mar 8 | Nov 20 |
| Arlington | 8a | Apr 22 | Oct 19 |
| Artondale | 9a | Mar 11 | Nov 21 |
| Auburn | 8b | Mar 20 | Nov 10 |
| Bainbridge Island | 9a | Mar 29 | Nov 14 |
| Battle Ground | 8b | Apr 26 | Oct 16 |
| Bellevue | 9a | Mar 8 | Nov 23 |
| Bellingham | 8b | Apr 1 | Nov 2 |
| Bonney Lake | 8b | Apr 11 | Oct 30 |
| Bothell | 8b | Mar 8 | Nov 23 |
| Bothell West | 8b | Mar 9 | Nov 17 |
| Bremerton | 9a | Mar 29 | Nov 14 |
| Bryn Mawr-Skyway | 9a | Mar 13 | Nov 16 |
| Burien | 9a | Mar 2 | Nov 23 |
| Camano | 8b | Mar 17 | Nov 11 |
| Camas | 9a | Mar 26 | Nov 17 |
| Centralia | 8b | Apr 22 | Oct 27 |
| Cheney | 6b | May 30 | Sep 4 |
| City of Sammamish | 8b | Mar 30 | Nov 7 |
| Columbia City | 9a | Mar 13 | Nov 17 |
| Cottage Lake | 8b | Apr 17 | Oct 23 |
| Covington | 8b | Mar 20 | Nov 10 |
| Des Moines | 9a | Mar 2 | Nov 23 |
| East Hill-Meridian | 8b | Mar 20 | Nov 10 |
| East Renton Highlands | 8b | Mar 13 | Nov 16 |
| East Wenatchee | 7b | Apr 4 | Oct 28 |
| Eastmont | 8b | Mar 9 | Nov 17 |
| Edmonds | 9a | Mar 9 | Nov 17 |
| Elk Plain | 8b | Apr 11 | Oct 30 |
| Ellensburg | 6b | May 8 | Oct 2 |
| Enumclaw | 8b | Apr 7 | Oct 30 |
| Everett | 8b | Mar 24 | Nov 2 |
| Fairwood | 8b | Mar 13 | Nov 16 |
| Federal Way | 8b | Mar 8 | Nov 14 |
| Ferndale | 8b | Mar 31 | Oct 30 |
| Five Corners | 8b | Apr 26 | Oct 18 |
| Frederickson | 8b | Apr 11 | Oct 30 |
| Graham | 8b | Apr 11 | Oct 30 |
| Grandview | 7b | May 1 | Oct 6 |
| Hazel Dell | 8b | Apr 26 | Oct 18 |
| Inglewood-Finn Hill | 9a | Mar 8 | Nov 23 |
| Issaquah | 8b | Mar 13 | Nov 16 |
| Joint Base Lewis McChord | 8b | Mar 11 | Nov 21 |
| Kelso | 8b | Apr 8 | Nov 5 |
| Kenmore | 9a | Mar 8 | Nov 23 |
| Kennewick | 7b | Mar 28 | Oct 30 |
| Kent | 8b | Mar 20 | Nov 10 |
| Kirkland | 8b | Mar 8 | Nov 23 |
| Klahanie | 8b | Mar 30 | Nov 7 |
| Lacey | 8b | Apr 29 | Oct 14 |
| Lake Forest Park | 9a | Mar 8 | Nov 23 |
| Lake Morton-Berrydale | 8b | Apr 20 | Oct 25 |
| Lake Stevens | 8b | Mar 24 | Nov 2 |
| Lakeland North | 8b | Mar 20 | Nov 10 |
| Lakeland South | 8b | Mar 8 | Nov 14 |
| Lakewood | 8b | Mar 11 | Nov 21 |
| Lea Hill | 8b | Mar 20 | Nov 10 |
| Longview | 8b | Apr 8 | Nov 5 |
| Lynden | 8a | Apr 18 | Oct 18 |
| Lynnwood | 9a | Mar 9 | Nov 17 |
| Maltby | 8b | Apr 17 | Oct 23 |
| Maple Valley | 8b | Apr 20 | Oct 25 |
| Martha Lake | 9a | Mar 9 | Nov 17 |
| Marysville | 8b | Mar 24 | Nov 2 |
| Mercer Island | 9a | Mar 13 | Nov 17 |
| Mill Creek | 8b | Mar 9 | Nov 17 |
| Mill Creek East | 8b | Mar 9 | Nov 17 |
| Monroe | 8b | Apr 17 | Oct 23 |
| Moses Lake | 7a | Apr 27 | Oct 8 |
| Mount Vernon | 8b | Mar 24 | Nov 3 |
| Mountlake Terrace | 9a | Mar 8 | Nov 23 |
| Mukilteo | 8b | Mar 9 | Nov 17 |
| Newcastle | 8b | Mar 13 | Nov 16 |
| North Creek | 8b | Mar 9 | Nov 17 |
| Oak Harbor | 8b | Mar 13 | Nov 14 |
| Olympia | 8b | Apr 29 | Oct 14 |
| Orchards | 8b | Apr 26 | Oct 18 |
| Parkland | 8b | Mar 8 | Nov 14 |
| Pasco | 7b | Mar 28 | Oct 30 |
| Picnic Point-North Lynnwood | 8b | Mar 9 | Nov 17 |
| Port Angeles | 8b | Mar 12 | Nov 19 |
| Port Orchard | 9a | Mar 29 | Nov 14 |
| Poulsbo | 8b | Mar 29 | Nov 14 |
| Prairie Ridge | 8b | Apr 11 | Oct 30 |
| Pullman | 6b | May 6 | Sep 29 |
| Puyallup | 8b | Apr 11 | Oct 30 |
| Redmond | 9a | Mar 8 | Nov 23 |
| Renton | 9a | Mar 13 | Nov 16 |
| Richland | 7b | Apr 6 | Oct 24 |
| Salmon Creek | 8b | Apr 26 | Oct 18 |
| Sammamish | 8b | Mar 8 | Nov 23 |
| SeaTac | 9a | Mar 2 | Nov 23 |
| Seattle | 9a | Mar 13 | Nov 17 |
| Sedro-Woolley | 8b | Mar 27 | Nov 6 |
| Shoreline | 9a | Mar 8 | Nov 23 |
| Silver Firs | 8b | Mar 9 | Nov 17 |
| Silverdale | 8b | Mar 29 | Nov 14 |
| Snoqualmie | 8b | Mar 30 | Nov 7 |
| South Hill | 8b | Apr 11 | Oct 30 |
| Spanaway | 8b | Apr 11 | Oct 30 |
| Spokane | 7a | Apr 26 | Oct 15 |
| Spokane Valley | 7a | Apr 26 | Oct 15 |
| Sunnyside | 7b | May 1 | Oct 6 |
| Tacoma | 8b | Mar 8 | Nov 14 |
| Tukwila | 9a | Mar 13 | Nov 16 |
| Tumwater | 8b | Apr 29 | Oct 14 |
| Union Hill-Novelty Hill | 8b | Mar 8 | Nov 23 |
| University Place | 8b | Mar 11 | Nov 21 |
| Vancouver | 8b | Mar 29 | Nov 9 |
| Vashon | 9a | Mar 2 | Nov 23 |
| Walla Walla | 7a | Mar 27 | Oct 31 |
| Washougal | 9a | Mar 26 | Nov 17 |
| Wenatchee | 7b | Apr 4 | Oct 28 |
| West Lake Sammamish | 8b | Mar 13 | Nov 16 |
| West Lake Stevens | 8b | Mar 24 | Nov 2 |
| West Richland | 7b | Apr 6 | Oct 24 |
| West Valley | 7a | Apr 8 | Oct 23 |
| White Center | 9a | Mar 13 | Nov 17 |
| Woodinville | 8b | Mar 8 | Nov 23 |
| Yakima | 7a | May 8 | Oct 4 |
Cities with 10,000+ residents. Data: USDA Plant Hardiness Zone Map 2023 and NOAA Climate Normals 1991–2020. Sources and method.