When to plant Potatoes in Washington

In spring, from Jan 15 – Mar 1 in Burien to May 1 – June 15 in Cheney.

In fall, from May 1 – June 15 in Ellensburg to Aug 10 – Sept 15 in Woodinville.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Potatoes planting dates by place in Washington
PlaceSpringFall
AberdeenFeb 20 – Mar 20July 25 – Aug 20
Airway HeightsMar 20 – May 10May 15 – June 15
AnacortesFeb 1 – Mar 1Aug 10 – Sept 15
ArlingtonMar 15 – Apr 10June 15 – July 15
AuburnFeb 10 – Mar 15July 25 – Aug 20
Bainbridge IslandFeb 20 – Mar 20July 25 – Aug 20
Battle GroundMar 20 – May 10June 15 – July 15
BellevueFeb 1 – Mar 1Aug 10 – Sept 15
BellinghamFeb 20 – Mar 20July 20 – Aug 10
Bonney LakeMar 10 – Apr 1July 20 – Aug 10
BothellFeb 1 – Mar 1Aug 10 – Sept 15
BremertonFeb 20 – Mar 20July 25 – Aug 20
BurienJan 15 – Mar 1Aug 10 – Sept 15
BurlingtonFeb 10 – Mar 15July 20 – Aug 10
CamasFeb 10 – Mar 15Aug 10 – Sept 15
CentraliaMar 15 – Apr 10July 20 – Aug 10
CheneyMay 1 – June 15May 15 – June 1
CovingtonMar 15 – Apr 10June 15 – July 15
Des MoinesJan 15 – Mar 1Aug 10 – Sept 15
East WenatcheeFeb 20 – Mar 20July 20 – Aug 10
EdgewoodFeb 1 – Mar 1July 25 – Aug 20
EdmondsFeb 1 – Mar 1Aug 10 – Sept 15
EllensburgApr 1 – June 1May 1 – June 15
EnumclawMar 10 – Apr 1July 20 – Aug 10
EverettFeb 10 – Mar 15July 20 – Aug 10
Federal WayFeb 1 – Mar 1July 25 – Aug 20
FerndaleFeb 20 – Mar 20July 20 – Aug 10
FifeFeb 1 – Mar 1July 25 – Aug 20
Gig HarborFeb 1 – Mar 1Aug 10 – Sept 15
GrandviewMar 20 – May 10May 15 – June 15
IssaquahFeb 1 – Mar 1Aug 10 – Sept 15
KelsoMar 10 – Apr 1July 25 – Aug 20
KenmoreFeb 1 – Mar 1Aug 10 – Sept 15
KennewickFeb 20 – Mar 20July 20 – Aug 10
KentFeb 10 – Mar 15July 25 – Aug 20
KirklandFeb 1 – Mar 1Aug 10 – Sept 15
LaceyMar 20 – May 10May 15 – June 15
Lake Forest ParkFeb 1 – Mar 1Aug 10 – Sept 15
Lake StevensFeb 10 – Mar 15July 20 – Aug 10
LakewoodFeb 1 – Mar 1Aug 10 – Sept 15
Liberty LakeMar 20 – May 10May 15 – June 15
LongviewMar 10 – Apr 1July 25 – Aug 20
LyndenMar 15 – Apr 10June 15 – July 15
LynnwoodFeb 1 – Mar 1Aug 10 – Sept 15
Maple ValleyMar 15 – Apr 10June 15 – July 15
MarysvilleFeb 10 – Mar 15July 20 – Aug 10
Mercer IslandFeb 1 – Mar 1Aug 10 – Sept 15
Mill CreekFeb 1 – Mar 1Aug 10 – Sept 15
MonroeMar 15 – Apr 10June 15 – July 15
Moses LakeMar 20 – May 10May 15 – June 15
Mount VernonFeb 10 – Mar 15July 20 – Aug 10
Mountlake TerraceFeb 1 – Mar 1Aug 10 – Sept 15
MukilteoFeb 1 – Mar 1Aug 10 – Sept 15
NewcastleFeb 1 – Mar 1Aug 10 – Sept 15
Oak HarborFeb 1 – Mar 1July 25 – Aug 20
OlympiaMar 20 – May 10May 15 – June 15
PascoMar 20 – May 10May 15 – June 15
Port AngelesFeb 1 – Mar 1Aug 10 – Sept 15
Port OrchardFeb 20 – Mar 20July 25 – Aug 20
Port TownsendJan 15 – Mar 1Aug 1 – Sept 15
PoulsboFeb 20 – Mar 20July 25 – Aug 20
PullmanApr 1 – June 1May 1 – June 15
PuyallupMar 10 – Apr 1July 20 – Aug 10
RedmondFeb 1 – Mar 1Aug 10 – Sept 15
RentonFeb 1 – Mar 1Aug 10 – Sept 15
RichlandMar 10 – Apr 1June 15 – July 15
RidgefieldMar 20 – May 10June 15 – July 15
SammamishFeb 20 – Mar 20July 25 – Aug 20
SeaTacJan 15 – Mar 1Aug 10 – Sept 15
SeattleFeb 1 – Mar 1Aug 10 – Sept 15
Sedro-WoolleyFeb 20 – Mar 20July 25 – Aug 20
SheltonMar 20 – May 10June 15 – July 15
ShorelineFeb 1 – Mar 1Aug 10 – Sept 15
SnohomishFeb 10 – Mar 15July 20 – Aug 10
SnoqualmieFeb 20 – Mar 20July 25 – Aug 20
SpokaneMar 20 – May 10May 15 – June 15
Spokane ValleyMar 20 – May 10May 15 – June 15
SumnerMar 10 – Apr 1July 20 – Aug 10
SunnysideMar 20 – May 10May 15 – June 15
TacomaFeb 1 – Mar 1July 25 – Aug 20
TukwilaJan 15 – Mar 1Aug 10 – Sept 15
TumwaterMar 20 – May 10May 15 – June 15
University PlaceFeb 1 – Mar 1Aug 10 – Sept 15
VancouverFeb 20 – Mar 20July 25 – Aug 20
Walla WallaFeb 20 – Mar 20July 20 – Aug 10
WashougalFeb 20 – Mar 20Aug 10 – Sept 15
WenatcheeFeb 20 – Mar 20July 20 – Aug 10
West RichlandMar 10 – Apr 1June 15 – July 15
WoodinvilleFeb 1 – Mar 1Aug 10 – Sept 15
YakimaMar 10 – Apr 1June 15 – July 15
YelmMar 20 – May 10May 15 – June 15

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 potatoes.