When to plant watermelon in Washington

Watermelon
Plant out in Seattle
Mar 22–Apr 5

Across Washington the window opens between March 16 and May 22. Find your city below; the dates follow each town's own average last frost.

Start indoors, Seattle
Feb 8–Feb 15
Plant out, Seattle
Mar 22–Apr 5
Sow outdoors, Seattle
Mar 22–Apr 5
Last sowing for a harvest
Aug 1
Last frost, Seattle
Mar 8

Start seeds indoors 3–4 weeks before the last frost; plant out 2–4 weeks after the last frost; sow outdoors 2–4 weeks after the last frost. In short-season areas, start seedlings indoors and pick an early variety.

Watermelon planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
SeattleMar 22–Apr 5
SpokaneMay 10–May 24
TacomaMar 22–Apr 5
VancouverApr 12–Apr 26
BellevueMar 22–Apr 5
KentApr 3–Apr 17
EverettApr 7–Apr 21
Spokane ValleyMay 10–May 24
RentonMar 27–Apr 10
Federal WayMar 22–Apr 5
YakimaApr 22–May 6
KirklandMar 22–Apr 5
BellinghamApr 15–Apr 29
KennewickApr 11–Apr 25
AuburnApr 3–Apr 17
PascoMay 11–May 25
RedmondMar 22–Apr 5
MarysvilleApr 7–Apr 21
South HillApr 25–May 9
ShorelineMar 22–Apr 5
SammamishApr 13–Apr 27
RichlandApr 20–May 4
LakewoodMar 25–Apr 8
LaceyMay 13–May 27
OlympiaMay 13–May 27
BothellMar 22–Apr 5
BurienMar 16–Mar 30
BremertonApr 12–Apr 26
EdmondsMar 23–Apr 6
PuyallupApr 25–May 9
All 76 cities
CityStart indoorsPlant outSow outdoorsLast frost
SeattleFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
SpokaneMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
TacomaFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
VancouverMar 1 to Mar 8Apr 12 to Apr 26Apr 12 to Apr 26Mar 29
BellevueFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
KentFeb 20 to Feb 27Apr 3 to Apr 17Apr 3 to Apr 17Mar 20
EverettFeb 24 to Mar 3Apr 7 to Apr 21Apr 7 to Apr 21Mar 24
Spokane ValleyMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
RentonFeb 13 to Feb 20Mar 27 to Apr 10Mar 27 to Apr 10Mar 13
Federal WayFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
YakimaMar 11 to Mar 18Apr 22 to May 6Apr 22 to May 6Apr 8
KirklandFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
BellinghamMar 4 to Mar 11Apr 15 to Apr 29Apr 15 to Apr 29Apr 1
KennewickFeb 28 to Mar 7Apr 11 to Apr 25Apr 11 to Apr 25Mar 28
AuburnFeb 20 to Feb 27Apr 3 to Apr 17Apr 3 to Apr 17Mar 20
PascoMar 30 to Apr 6May 11 to May 25May 11 to May 25Apr 27
RedmondFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
MarysvilleFeb 24 to Mar 3Apr 7 to Apr 21Apr 7 to Apr 21Mar 24
South HillMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
ShorelineFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
SammamishMar 2 to Mar 9Apr 13 to Apr 27Apr 13 to Apr 27Mar 30
RichlandMar 9 to Mar 16Apr 20 to May 4Apr 20 to May 4Apr 6
LakewoodFeb 11 to Feb 18Mar 25 to Apr 8Mar 25 to Apr 8Mar 11
LaceyApr 1 to Apr 8May 13 to May 27May 13 to May 27Apr 29
OlympiaApr 1 to Apr 8May 13 to May 27May 13 to May 27Apr 29
BothellFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
BurienFeb 2 to Feb 9Mar 16 to Mar 30Mar 16 to Mar 30Mar 2
BremertonMar 1 to Mar 8Apr 12 to Apr 26Apr 12 to Apr 26Mar 29
EdmondsFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
PuyallupMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
LynnwoodFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Lake StevensFeb 24 to Mar 3Apr 7 to Apr 21Apr 7 to Apr 21Mar 24
IssaquahFeb 13 to Feb 20Mar 27 to Apr 10Mar 27 to Apr 10Mar 13
ParklandFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
LongviewMar 11 to Mar 18Apr 22 to May 6Apr 22 to May 6Apr 8
WenatcheeMar 7 to Mar 14Apr 18 to May 2Apr 18 to May 2Apr 4
University PlaceFeb 11 to Feb 18Mar 25 to Apr 8Mar 25 to Apr 8Mar 11
Mount VernonFeb 24 to Mar 3Apr 7 to Apr 21Apr 7 to Apr 21Mar 24
GrahamMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
SeaTacFeb 2 to Feb 9Mar 16 to Mar 30Mar 16 to Mar 30Mar 2
SpanawayMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
Walla WallaFeb 27 to Mar 6Apr 10 to Apr 24Apr 10 to Apr 24Mar 27
PullmanApr 8 to Apr 15May 20 to Jun 3May 20 to Jun 3May 6
Des MoinesFeb 2 to Feb 9Mar 16 to Mar 30Mar 16 to Mar 30Mar 2
OrchardsMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
Maple ValleyMar 23 to Mar 30May 4 to May 18May 4 to May 18Apr 20
TumwaterApr 1 to Apr 8May 13 to May 27May 13 to May 27Apr 29
CamasFeb 16 to Feb 23Mar 30 to Apr 13Mar 30 to Apr 13Mar 16
Moses LakeMar 30 to Apr 6May 11 to May 25May 11 to May 25Apr 27
Mill Creek EastFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Mountlake TerraceFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
Mercer IslandFeb 13 to Feb 20Mar 27 to Apr 10Mar 27 to Apr 10Mar 13
Bainbridge IslandMar 1 to Mar 8Apr 12 to Apr 26Apr 12 to Apr 26Mar 29
KenmoreFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
FredericksonMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
Oak HarborFeb 13 to Feb 20Mar 27 to Apr 10Mar 27 to Apr 10Mar 13
North LynnwoodFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Battle GroundMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
EastmontFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Union Hill-Novelty HillFeb 8 to Feb 15Mar 22 to Apr 5Mar 22 to Apr 5Mar 8
Cottage LakeMar 20 to Mar 27May 1 to May 15May 1 to May 15Apr 17
Hazel DellMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
Martha LakeFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Bonney LakeMar 14 to Mar 21Apr 25 to May 9Apr 25 to May 9Apr 11
ArlingtonMar 25 to Apr 1May 6 to May 20May 6 to May 20Apr 22
TukwilaFeb 2 to Feb 9Mar 16 to Mar 30Mar 16 to Mar 30Mar 2
Silver FirsFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
CovingtonMar 23 to Mar 30May 4 to May 18May 4 to May 18Apr 20
Five CornersMar 29 to Apr 5May 10 to May 24May 10 to May 24Apr 26
EllensburgApr 10 to Apr 17May 22 to Jun 5May 22 to Jun 5May 8
MukilteoFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
SilverdaleMar 1 to Mar 8Apr 12 to Apr 26Apr 12 to Apr 26Mar 29
Bothell WestFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Mill CreekFeb 9 to Feb 16Mar 23 to Apr 6Mar 23 to Apr 6Mar 9
Port AngelesFeb 12 to Feb 19Mar 26 to Apr 9Mar 26 to Apr 9Mar 12
MonroeMar 20 to Mar 27May 1 to May 15May 1 to May 15Apr 17

Questions

When should I plant watermelon in Washington?

In Seattle, plant out from March 22 to April 5. Across Washington the window opens between March 16 and May 22, depending on the local last frost.

How is this date worked out?

Start seeds indoors 3–4 weeks before the last frost; plant out 2–4 weeks after the last frost; sow outdoors 2–4 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Washington

Watermelon in other states

Frost dates for every city in Washington