City	Sow outdoors	Last frost
Seattle	Mar 29 to Apr 12	Mar 8
Spokane	May 17 to May 31	Apr 26
Tacoma	Mar 29 to Apr 12	Mar 8
Vancouver	Apr 19 to May 3	Mar 29
Bellevue	Mar 29 to Apr 12	Mar 8
Kent	Apr 10 to Apr 24	Mar 20
Everett	Apr 14 to Apr 28	Mar 24
Spokane Valley	May 17 to May 31	Apr 26
Renton	Apr 3 to Apr 17	Mar 13
Federal Way	Mar 29 to Apr 12	Mar 8
Yakima	Apr 29 to May 13	Apr 8
Kirkland	Mar 29 to Apr 12	Mar 8
Bellingham	Apr 22 to May 6	Apr 1
Kennewick	Apr 18 to May 2	Mar 28
Auburn	Apr 10 to Apr 24	Mar 20
Pasco	May 18 to Jun 1	Apr 27
Redmond	Mar 29 to Apr 12	Mar 8
Marysville	Apr 14 to Apr 28	Mar 24
South Hill	May 2 to May 16	Apr 11
Shoreline	Mar 29 to Apr 12	Mar 8
Sammamish	Apr 20 to May 4	Mar 30
Richland	Apr 27 to May 11	Apr 6
Lakewood	Apr 1 to Apr 15	Mar 11
Lacey	May 20 to Jun 3	Apr 29
Olympia	May 20 to Jun 3	Apr 29
Bothell	Mar 29 to Apr 12	Mar 8
Burien	Mar 23 to Apr 6	Mar 2
Bremerton	Apr 19 to May 3	Mar 29
Edmonds	Mar 30 to Apr 13	Mar 9
Puyallup	May 2 to May 16	Apr 11
Lynnwood	Mar 30 to Apr 13	Mar 9
Lake Stevens	Apr 14 to Apr 28	Mar 24
Issaquah	Apr 3 to Apr 17	Mar 13
Parkland	Mar 29 to Apr 12	Mar 8
Longview	Apr 29 to May 13	Apr 8
Wenatchee	Apr 25 to May 9	Apr 4
University Place	Apr 1 to Apr 15	Mar 11
Mount Vernon	Apr 14 to Apr 28	Mar 24
Graham	May 2 to May 16	Apr 11
SeaTac	Mar 23 to Apr 6	Mar 2
Spanaway	May 2 to May 16	Apr 11
Walla Walla	Apr 17 to May 1	Mar 27
Pullman	May 27 to Jun 10	May 6
Des Moines	Mar 23 to Apr 6	Mar 2
Orchards	May 17 to May 31	Apr 26
Maple Valley	May 11 to May 25	Apr 20
Tumwater	May 20 to Jun 3	Apr 29
Camas	Apr 6 to Apr 20	Mar 16
Moses Lake	May 18 to Jun 1	Apr 27
Mill Creek East	Mar 30 to Apr 13	Mar 9
Mountlake Terrace	Mar 29 to Apr 12	Mar 8
Mercer Island	Apr 3 to Apr 17	Mar 13
Bainbridge Island	Apr 19 to May 3	Mar 29
Kenmore	Mar 29 to Apr 12	Mar 8
Frederickson	May 2 to May 16	Apr 11
Oak Harbor	Apr 3 to Apr 17	Mar 13
North Lynnwood	Mar 30 to Apr 13	Mar 9
Battle Ground	May 17 to May 31	Apr 26
Eastmont	Mar 30 to Apr 13	Mar 9
Union Hill-Novelty Hill	Mar 29 to Apr 12	Mar 8
Cottage Lake	May 8 to May 22	Apr 17
Hazel Dell	May 17 to May 31	Apr 26
Martha Lake	Mar 30 to Apr 13	Mar 9
Bonney Lake	May 2 to May 16	Apr 11
Arlington	May 13 to May 27	Apr 22
Tukwila	Mar 23 to Apr 6	Mar 2
Silver Firs	Mar 30 to Apr 13	Mar 9
Covington	May 11 to May 25	Apr 20
Five Corners	May 17 to May 31	Apr 26
Ellensburg	May 29 to Jun 12	May 8
Mukilteo	Mar 30 to Apr 13	Mar 9
Silverdale	Apr 19 to May 3	Mar 29
Bothell West	Mar 30 to Apr 13	Mar 9
Mill Creek	Mar 30 to Apr 13	Mar 9
Port Angeles	Apr 2 to Apr 16	Mar 12
Monroe	May 8 to May 22	Apr 17

Questions

When should I plant okra in Washington?

In Seattle, sow outdoors from March 29 to April 12. Across Washington the window opens between March 23 and May 29, depending on the local last frost.

How is this date worked out?

Sow outdoors 3–5 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.