When to plant tomatoes in Washington

Plant out in Seattle

Mar 15–Mar 29

Across Washington the window opens between March 9 and May 15. Find your city below; the dates follow each town's own average last frost.

Start indoors, Seattle: Jan 11–Jan 25
Plant out, Seattle: Mar 15–Mar 29
Last sowing for a harvest: Aug 16
Last frost, Seattle: Mar 8

Start seeds indoors 6–8 weeks before the last frost; plant out 1–3 weeks after the last frost. Wait for nights that stay above 50°F. A cold snap after transplanting stalls tomatoes for weeks.

Tomatoes planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

SeattleMar 15–Mar 29

SpokaneMay 3–May 17

TacomaMar 15–Mar 29

VancouverApr 5–Apr 19

BellevueMar 15–Mar 29

KentMar 27–Apr 10

EverettMar 31–Apr 14

Spokane ValleyMay 3–May 17

RentonMar 20–Apr 3

Federal WayMar 15–Mar 29

YakimaApr 15–Apr 29

KirklandMar 15–Mar 29

BellinghamApr 8–Apr 22

KennewickApr 4–Apr 18

AuburnMar 27–Apr 10

PascoMay 4–May 18

RedmondMar 15–Mar 29

MarysvilleMar 31–Apr 14

South HillApr 18–May 2

ShorelineMar 15–Mar 29

SammamishApr 6–Apr 20

RichlandApr 13–Apr 27

LakewoodMar 18–Apr 1

LaceyMay 6–May 20

OlympiaMay 6–May 20

BothellMar 15–Mar 29

BurienMar 9–Mar 23

BremertonApr 5–Apr 19

EdmondsMar 16–Mar 30

PuyallupApr 18–May 2

All 76 cities

City	Start indoors	Plant out	Last frost
Seattle	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Spokane	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Tacoma	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Vancouver	Feb 1 to Feb 15	Apr 5 to Apr 19	Mar 29
Bellevue	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Kent	Jan 23 to Feb 6	Mar 27 to Apr 10	Mar 20
Everett	Jan 27 to Feb 10	Mar 31 to Apr 14	Mar 24
Spokane Valley	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Renton	Jan 16 to Jan 30	Mar 20 to Apr 3	Mar 13
Federal Way	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Yakima	Feb 11 to Feb 25	Apr 15 to Apr 29	Apr 8
Kirkland	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Bellingham	Feb 4 to Feb 18	Apr 8 to Apr 22	Apr 1
Kennewick	Jan 31 to Feb 14	Apr 4 to Apr 18	Mar 28
Auburn	Jan 23 to Feb 6	Mar 27 to Apr 10	Mar 20
Pasco	Mar 2 to Mar 16	May 4 to May 18	Apr 27
Redmond	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Marysville	Jan 27 to Feb 10	Mar 31 to Apr 14	Mar 24
South Hill	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
Shoreline	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Sammamish	Feb 2 to Feb 16	Apr 6 to Apr 20	Mar 30
Richland	Feb 9 to Feb 23	Apr 13 to Apr 27	Apr 6
Lakewood	Jan 14 to Jan 28	Mar 18 to Apr 1	Mar 11
Lacey	Mar 4 to Mar 18	May 6 to May 20	Apr 29
Olympia	Mar 4 to Mar 18	May 6 to May 20	Apr 29
Bothell	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Burien	Jan 5 to Jan 19	Mar 9 to Mar 23	Mar 2
Bremerton	Feb 1 to Feb 15	Apr 5 to Apr 19	Mar 29
Edmonds	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Puyallup	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
Lynnwood	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Lake Stevens	Jan 27 to Feb 10	Mar 31 to Apr 14	Mar 24
Issaquah	Jan 16 to Jan 30	Mar 20 to Apr 3	Mar 13
Parkland	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Longview	Feb 11 to Feb 25	Apr 15 to Apr 29	Apr 8
Wenatchee	Feb 7 to Feb 21	Apr 11 to Apr 25	Apr 4
University Place	Jan 14 to Jan 28	Mar 18 to Apr 1	Mar 11
Mount Vernon	Jan 27 to Feb 10	Mar 31 to Apr 14	Mar 24
Graham	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
SeaTac	Jan 5 to Jan 19	Mar 9 to Mar 23	Mar 2
Spanaway	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
Walla Walla	Jan 30 to Feb 13	Apr 3 to Apr 17	Mar 27
Pullman	Mar 11 to Mar 25	May 13 to May 27	May 6
Des Moines	Jan 5 to Jan 19	Mar 9 to Mar 23	Mar 2
Orchards	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Maple Valley	Feb 23 to Mar 9	Apr 27 to May 11	Apr 20
Tumwater	Mar 4 to Mar 18	May 6 to May 20	Apr 29
Camas	Jan 19 to Feb 2	Mar 23 to Apr 6	Mar 16
Moses Lake	Mar 2 to Mar 16	May 4 to May 18	Apr 27
Mill Creek East	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Mountlake Terrace	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Mercer Island	Jan 16 to Jan 30	Mar 20 to Apr 3	Mar 13
Bainbridge Island	Feb 1 to Feb 15	Apr 5 to Apr 19	Mar 29
Kenmore	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Frederickson	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
Oak Harbor	Jan 16 to Jan 30	Mar 20 to Apr 3	Mar 13
North Lynnwood	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Battle Ground	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Eastmont	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Union Hill-Novelty Hill	Jan 11 to Jan 25	Mar 15 to Mar 29	Mar 8
Cottage Lake	Feb 20 to Mar 6	Apr 24 to May 8	Apr 17
Hazel Dell	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Martha Lake	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Bonney Lake	Feb 14 to Feb 28	Apr 18 to May 2	Apr 11
Arlington	Feb 25 to Mar 11	Apr 29 to May 13	Apr 22
Tukwila	Jan 5 to Jan 19	Mar 9 to Mar 23	Mar 2
Silver Firs	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Covington	Feb 23 to Mar 9	Apr 27 to May 11	Apr 20
Five Corners	Mar 1 to Mar 15	May 3 to May 17	Apr 26
Ellensburg	Mar 13 to Mar 27	May 15 to May 29	May 8
Mukilteo	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Silverdale	Feb 1 to Feb 15	Apr 5 to Apr 19	Mar 29
Bothell West	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Mill Creek	Jan 12 to Jan 26	Mar 16 to Mar 30	Mar 9
Port Angeles	Jan 15 to Jan 29	Mar 19 to Apr 2	Mar 12
Monroe	Feb 20 to Mar 6	Apr 24 to May 8	Apr 17

Questions

When should I plant tomatoes in Washington?

In Seattle, plant out from March 15 to March 29. Across Washington the window opens between March 9 and May 15, depending on the local last frost.

How is this date worked out?

Start seeds indoors 6–8 weeks before the last frost; plant out 1–3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Washington

Tomatoes in other states

Frost dates for every city in Washington