When to plant Lettuce in Washington

In spring, from Jan 1 – Mar 15 in Burien to May 10 – June 30 in Cheney.

In fall, from May 15 – July 15 in Cheney to Sept 1 – Nov 1 in Woodinville.

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

Leaf lettuce planting dates by place in Washington
PlaceSpringFall
AberdeenFeb 15 – Apr 15Aug 25 – Oct 1
Airway HeightsApr 1 – June 1July 15 – Sept 1
AnacortesJan 15 – Apr 1Sept 1 – Nov 1Now
ArlingtonMar 20 – May 15July 15 – Sept 1
AuburnFeb 1 – Apr 1Aug 25 – Oct 1
Bainbridge IslandFeb 15 – Apr 15Aug 25 – Oct 1
Battle GroundApr 1 – June 1July 15 – Sept 1
BellevueJan 15 – Apr 1Sept 1 – Nov 1Now
BellinghamFeb 15 – Apr 15Aug 15 – Oct 1
Bonney LakeMar 15 – May 15Aug 15 – Oct 1
BothellJan 15 – Apr 1Sept 1 – Nov 1Now
BremertonFeb 15 – Apr 15Aug 25 – Oct 1
BurienJan 1 – Mar 15Sept 1 – Nov 1Now
BurlingtonFeb 1 – Apr 1Aug 15 – Oct 1
CamasFeb 1 – Apr 1Sept 1 – Nov 1Now
CentraliaMar 20 – May 15Aug 15 – Oct 1
CheneyMay 10 – June 30May 15 – July 15
CovingtonMar 20 – May 15July 15 – Sept 1
Des MoinesJan 1 – Mar 15Sept 1 – Nov 1Now
East WenatcheeFeb 15 – Apr 15Aug 15 – Oct 1
EdgewoodJan 15 – Apr 1Aug 25 – Oct 1
EdmondsJan 15 – Apr 1Sept 1 – Nov 1Now
EllensburgApr 15 – June 15June 1 – Aug 1
EnumclawMar 15 – May 15Aug 15 – Oct 1
EverettFeb 1 – Apr 1Aug 15 – Oct 1
Federal WayJan 15 – Apr 1Aug 25 – Oct 1
FerndaleFeb 15 – Apr 15Aug 15 – Oct 1
FifeJan 15 – Apr 1Aug 25 – Oct 1
Gig HarborJan 15 – Apr 1Sept 1 – Nov 1Now
GrandviewApr 1 – June 1July 15 – Sept 1
IssaquahJan 15 – Apr 1Sept 1 – Nov 1Now
KelsoMar 15 – May 15Aug 25 – Oct 1
KenmoreJan 15 – Apr 1Sept 1 – Nov 1Now
KennewickFeb 15 – Apr 15Aug 15 – Oct 1
KentFeb 1 – Apr 1Aug 25 – Oct 1
KirklandJan 15 – Apr 1Sept 1 – Nov 1Now
LaceyApr 1 – June 1July 15 – Sept 1
Lake Forest ParkJan 15 – Apr 1Sept 1 – Nov 1Now
Lake StevensFeb 1 – Apr 1Aug 15 – Oct 1
LakewoodJan 15 – Apr 1Sept 1 – Nov 1Now
Liberty LakeApr 1 – June 1July 15 – Sept 1
LongviewMar 15 – May 15Aug 25 – Oct 1
LyndenMar 20 – May 15July 15 – Sept 1
LynnwoodJan 15 – Apr 1Sept 1 – Nov 1Now
Maple ValleyMar 20 – May 15July 15 – Sept 1
MarysvilleFeb 1 – Apr 1Aug 15 – Oct 1
Mercer IslandJan 15 – Apr 1Sept 1 – Nov 1Now
Mill CreekJan 15 – Apr 1Sept 1 – Nov 1Now
MonroeMar 20 – May 15July 15 – Sept 1
Moses LakeApr 1 – June 1July 15 – Sept 1
Mount VernonFeb 1 – Apr 1Aug 15 – Oct 1
Mountlake TerraceJan 15 – Apr 1Sept 1 – Nov 1Now
MukilteoJan 15 – Apr 1Sept 1 – Nov 1Now
NewcastleJan 15 – Apr 1Sept 1 – Nov 1Now
Oak HarborJan 15 – Apr 1Aug 25 – Oct 1
OlympiaApr 1 – June 1July 15 – Sept 1
PascoApr 1 – June 1July 15 – Sept 1
Port AngelesJan 15 – Apr 1Sept 1 – Nov 1Now
Port OrchardFeb 15 – Apr 15Aug 25 – Oct 1
Port TownsendJan 1 – Mar 15Sept 1 – Dec 1Now
PoulsboFeb 15 – Apr 15Aug 25 – Oct 1
PullmanApr 15 – June 15June 1 – Aug 1
PuyallupMar 15 – May 15Aug 15 – Oct 1
RedmondJan 15 – Apr 1Sept 1 – Nov 1Now
RentonJan 15 – Apr 1Sept 1 – Nov 1Now
RichlandMar 15 – May 15July 15 – Sept 1
RidgefieldApr 1 – June 1July 15 – Sept 1
SammamishFeb 15 – Apr 15Aug 25 – Oct 1
SeaTacJan 1 – Mar 15Sept 1 – Nov 1Now
SeattleJan 15 – Apr 1Sept 1 – Nov 1Now
Sedro-WoolleyFeb 15 – Apr 15Aug 25 – Oct 1
SheltonApr 1 – June 1July 15 – Sept 1
ShorelineJan 15 – Apr 1Sept 1 – Nov 1Now
SnohomishFeb 1 – Apr 1Aug 15 – Oct 1
SnoqualmieFeb 15 – Apr 15Aug 25 – Oct 1
SpokaneApr 1 – June 1July 15 – Sept 1
Spokane ValleyApr 1 – June 1July 15 – Sept 1
SumnerMar 15 – May 15Aug 15 – Oct 1
SunnysideApr 1 – June 1July 15 – Sept 1
TacomaJan 15 – Apr 1Aug 25 – Oct 1
TukwilaJan 1 – Mar 15Sept 1 – Nov 1Now
TumwaterApr 1 – June 1July 15 – Sept 1
University PlaceJan 15 – Apr 1Sept 1 – Nov 1Now
VancouverFeb 15 – Apr 15Aug 25 – Oct 1
Walla WallaFeb 15 – Apr 15Aug 15 – Oct 1
WashougalFeb 15 – Apr 15Sept 1 – Nov 1Now
WenatcheeFeb 15 – Apr 15Aug 15 – Oct 1
West RichlandMar 15 – May 15July 15 – Sept 1
WoodinvilleJan 15 – Apr 1Sept 1 – Nov 1Now
YakimaMar 15 – May 15July 15 – Sept 1
YelmApr 1 – June 1July 15 – Sept 1

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 leaf lettuce.