When to plant Broccoli in Washington

In spring, from Feb 1 – Mar 1 in Burien to May 10 – June 10 in Cheney.

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

Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Broccoli planting dates by place in Washington
PlaceSpringFall
AberdeenMar 1 – 20Aug 1 – Sept 1
Airway HeightsApr 1 – May 1June 15 – July 15
AnacortesFeb 15 – Mar 15Aug 1 – Sept 15
ArlingtonMar 25 – Apr 20July 1 – Aug 1
AuburnFeb 15 – Mar 15Aug 1 – Sept 1
Bainbridge IslandMar 1 – 20Aug 1 – Sept 1
Battle GroundApr 1 – May 1July 1 – Aug 1
BellevueFeb 15 – Mar 15Aug 1 – Sept 15
BellinghamMar 1 – 20July 1 – Aug 15
Bonney LakeMar 15 – Apr 15July 1 – Aug 15
BothellFeb 15 – Mar 15Aug 1 – Sept 15
BremertonMar 1 – 20Aug 1 – Sept 1
BurienFeb 1 – Mar 1Aug 1 – Sept 15
BurlingtonFeb 15 – Mar 15July 1 – Aug 15
CamasFeb 15 – Mar 15Aug 1 – Sept 15
CentraliaMar 25 – Apr 20July 1 – Aug 15
CheneyMay 10 – June 10May 1 – June 1
CovingtonMar 25 – Apr 20July 1 – Aug 1
Des MoinesFeb 1 – Mar 1Aug 1 – Sept 15
East WenatcheeMar 1 – 20July 1 – Aug 15
EdgewoodFeb 15 – Mar 15Aug 1 – Sept 1
EdmondsFeb 15 – Mar 15Aug 1 – Sept 15
EllensburgApr 15 – June 1June 1 – 30
EnumclawMar 15 – Apr 15July 1 – Aug 15
EverettFeb 15 – Mar 15July 1 – Aug 15
Federal WayFeb 15 – Mar 15Aug 1 – Sept 1
FerndaleMar 1 – 20July 1 – Aug 15
FifeFeb 15 – Mar 15Aug 1 – Sept 1
Gig HarborFeb 15 – Mar 15Aug 1 – Sept 15
GrandviewApr 1 – May 1June 15 – July 15
IssaquahFeb 15 – Mar 15Aug 1 – Sept 15
KelsoMar 15 – Apr 15Aug 1 – Sept 1
KenmoreFeb 15 – Mar 15Aug 1 – Sept 15
KennewickMar 1 – 20July 1 – Aug 15
KentFeb 15 – Mar 15Aug 1 – Sept 1
KirklandFeb 15 – Mar 15Aug 1 – Sept 15
LaceyApr 1 – May 1June 15 – July 15
Lake Forest ParkFeb 15 – Mar 15Aug 1 – Sept 15
Lake StevensFeb 15 – Mar 15July 1 – Aug 15
LakewoodFeb 15 – Mar 15Aug 1 – Sept 15
Liberty LakeApr 1 – May 1June 15 – July 15
LongviewMar 15 – Apr 15Aug 1 – Sept 1
LyndenMar 25 – Apr 20July 1 – Aug 1
LynnwoodFeb 15 – Mar 15Aug 1 – Sept 15
Maple ValleyMar 25 – Apr 20July 1 – Aug 1
MarysvilleFeb 15 – Mar 15July 1 – Aug 15
Mercer IslandFeb 15 – Mar 15Aug 1 – Sept 15
Mill CreekFeb 15 – Mar 15Aug 1 – Sept 15
MonroeMar 25 – Apr 20July 1 – Aug 1
Moses LakeApr 1 – May 1June 15 – July 15
Mount VernonFeb 15 – Mar 15July 1 – Aug 15
Mountlake TerraceFeb 15 – Mar 15Aug 1 – Sept 15
MukilteoFeb 15 – Mar 15Aug 1 – Sept 15
NewcastleFeb 15 – Mar 15Aug 1 – Sept 15
Oak HarborFeb 15 – Mar 15Aug 1 – Sept 1
OlympiaApr 1 – May 1June 15 – July 15
PascoApr 1 – May 1June 15 – July 15
Port AngelesFeb 15 – Mar 15Aug 1 – Sept 15
Port OrchardMar 1 – 20Aug 1 – Sept 1
Port TownsendFeb 1 – Mar 1Aug 1 – Oct 1
PoulsboMar 1 – 20Aug 1 – Sept 1
PullmanApr 15 – June 1June 1 – 30
PuyallupMar 15 – Apr 15July 1 – Aug 15
RedmondFeb 15 – Mar 15Aug 1 – Sept 15
RentonFeb 15 – Mar 15Aug 1 – Sept 15
RichlandMar 15 – Apr 15July 1 – Aug 1
RidgefieldApr 1 – May 1July 1 – Aug 1
SammamishMar 1 – 20Aug 1 – Sept 1
SeaTacFeb 1 – Mar 1Aug 1 – Sept 15
SeattleFeb 15 – Mar 15Aug 1 – Sept 15
Sedro-WoolleyMar 1 – 20Aug 1 – Sept 1
SheltonApr 1 – May 1July 1 – Aug 1
ShorelineFeb 15 – Mar 15Aug 1 – Sept 15
SnohomishFeb 15 – Mar 15July 1 – Aug 15
SnoqualmieMar 1 – 20Aug 1 – Sept 1
SpokaneApr 1 – May 1June 15 – July 15
Spokane ValleyApr 1 – May 1June 15 – July 15
SumnerMar 15 – Apr 15July 1 – Aug 15
SunnysideApr 1 – May 1June 15 – July 15
TacomaFeb 15 – Mar 15Aug 1 – Sept 1
TukwilaFeb 1 – Mar 1Aug 1 – Sept 15
TumwaterApr 1 – May 1June 15 – July 15
University PlaceFeb 15 – Mar 15Aug 1 – Sept 15
VancouverMar 1 – 20Aug 1 – Sept 1
Walla WallaMar 1 – 20July 1 – Aug 15
WashougalMar 1 – 20Aug 1 – Sept 15
WenatcheeMar 1 – 20July 1 – Aug 15
West RichlandMar 15 – Apr 15July 1 – Aug 1
WoodinvilleFeb 15 – Mar 15Aug 1 – Sept 15
YakimaMar 15 – Apr 15July 1 – Aug 1
YelmApr 1 – May 1June 15 – July 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 broccoli.