When to plant Swiss chard in Washington

In spring, from Feb 1 – May 1 in Burien to May 20 – June 1 in Cheney.

In fall, from May 15 – June 15 in Cheney to June 1 – July 20 in Yelm.

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

Swiss chard planting dates by place in Washington
PlaceSpringFall
AberdeenMar 1 – May 25June 1 – Sept 15
Airway HeightsApr 15 – June 15June 1 – July 20
AnacortesFeb 15 – May 15June 1 – Oct 1
ArlingtonApr 1 – June 15June 1 – Aug 1
AuburnFeb 20 – May 15June 1 – Sept 15
Bainbridge IslandMar 1 – May 25June 1 – Sept 15
Battle GroundApr 15 – June 15June 1 – Aug 1
BellevueFeb 15 – May 15June 1 – Oct 1
BellinghamMar 1 – May 25June 1 – Sept 10
Bonney LakeMar 15 – June 15June 1 – Sept 10
BothellFeb 15 – May 15June 1 – Oct 1
BremertonMar 1 – May 25June 1 – Sept 15
BurienFeb 1 – May 1June 1 – Oct 1
BurlingtonFeb 20 – May 15June 1 – Sept 10
CamasFeb 20 – May 15June 1 – Oct 1
CentraliaApr 1 – June 15June 1 – Sept 10
CheneyMay 20 – June 1May 15 – June 15
CovingtonApr 1 – June 15June 1 – Aug 1
Des MoinesFeb 1 – May 1June 1 – Oct 1
East WenatcheeMar 1 – May 25June 1 – Sept 10
EdgewoodFeb 15 – May 15June 1 – Sept 15
EdmondsFeb 15 – May 15June 1 – Oct 1
EllensburgApr 20 – June 15June 1 – July 5
EnumclawMar 15 – June 15June 1 – Sept 10
EverettFeb 20 – May 15June 1 – Sept 10
Federal WayFeb 15 – May 15June 1 – Sept 15
FerndaleMar 1 – May 25June 1 – Sept 10
FifeFeb 15 – May 15June 1 – Sept 15
Gig HarborFeb 15 – May 15June 1 – Oct 1
GrandviewApr 15 – June 15June 1 – July 20
IssaquahFeb 15 – May 15June 1 – Oct 1
KelsoMar 15 – June 15June 1 – Sept 15
KenmoreFeb 15 – May 15June 1 – Oct 1
KennewickMar 1 – May 25June 1 – Sept 10
KentFeb 20 – May 15June 1 – Sept 15
KirklandFeb 15 – May 15June 1 – Oct 1
LaceyApr 15 – June 15June 1 – July 20
Lake Forest ParkFeb 15 – May 15June 1 – Oct 1
Lake StevensFeb 20 – May 15June 1 – Sept 10
LakewoodFeb 15 – May 15June 1 – Oct 1
Liberty LakeApr 15 – June 15June 1 – July 20
LongviewMar 15 – June 15June 1 – Sept 15
LyndenApr 1 – June 15June 1 – Aug 1
LynnwoodFeb 15 – May 15June 1 – Oct 1
Maple ValleyApr 1 – June 15June 1 – Aug 1
MarysvilleFeb 20 – May 15June 1 – Sept 10
Mercer IslandFeb 15 – May 15June 1 – Oct 1
Mill CreekFeb 15 – May 15June 1 – Oct 1
MonroeApr 1 – June 15June 1 – Aug 1
Moses LakeApr 15 – June 15June 1 – July 20
Mount VernonFeb 20 – May 15June 1 – Sept 10
Mountlake TerraceFeb 15 – May 15June 1 – Oct 1
MukilteoFeb 15 – May 15June 1 – Oct 1
NewcastleFeb 15 – May 15June 1 – Oct 1
Oak HarborFeb 15 – May 15June 1 – Sept 15
OlympiaApr 15 – June 15June 1 – July 20
PascoApr 15 – June 15June 1 – July 20
Port AngelesFeb 15 – May 15June 1 – Oct 1
Port OrchardMar 1 – May 25June 1 – Sept 15
Port TownsendFeb 1 – May 1June 1 – Nov 1Now
PoulsboMar 1 – May 25June 1 – Sept 15
PullmanApr 20 – June 15June 1 – July 5
PuyallupMar 15 – June 15June 1 – Sept 10
RedmondFeb 15 – May 15June 1 – Oct 1
RentonFeb 15 – May 15June 1 – Oct 1
RichlandMar 15 – June 15June 1 – Aug 1
RidgefieldApr 15 – June 15June 1 – Aug 1
SammamishMar 1 – May 25June 1 – Sept 15
SeaTacFeb 1 – May 1June 1 – Oct 1
SeattleFeb 15 – May 15June 1 – Oct 1
Sedro-WoolleyMar 1 – May 25June 1 – Sept 15
SheltonApr 15 – June 15June 1 – Aug 1
ShorelineFeb 15 – May 15June 1 – Oct 1
SnohomishFeb 20 – May 15June 1 – Sept 10
SnoqualmieMar 1 – May 25June 1 – Sept 15
SpokaneApr 15 – June 15June 1 – July 20
Spokane ValleyApr 15 – June 15June 1 – July 20
SumnerMar 15 – June 15June 1 – Sept 10
SunnysideApr 15 – June 15June 1 – July 20
TacomaFeb 15 – May 15June 1 – Sept 15
TukwilaFeb 1 – May 1June 1 – Oct 1
TumwaterApr 15 – June 15June 1 – July 20
University PlaceFeb 15 – May 15June 1 – Oct 1
VancouverMar 1 – May 25June 1 – Sept 15
Walla WallaMar 1 – May 25June 1 – Sept 10
WashougalMar 1 – May 25June 1 – Oct 1
WenatcheeMar 1 – May 25June 1 – Sept 10
West RichlandMar 15 – June 15June 1 – Aug 1
WoodinvilleFeb 15 – May 15June 1 – Oct 1
YakimaMar 15 – June 15June 1 – Aug 1
YelmApr 15 – June 15June 1 – July 20

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 swiss chard.