When to plant pumpkins in Oregon

Pumpkins
Sow outdoors in Portland
Mar 11–Mar 25

Across Oregon the window opens between February 25 and June 23. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Portland
Mar 11–Mar 25
Last sowing for a harvest
Jul 20
Last frost, Portland
Feb 25

Sow outdoors 2–4 weeks after the last frost. For Halloween pumpkins, count back the variety's days to maturity from late September.

Pumpkins planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
PortlandMar 11–Mar 25
SalemApr 17–May 1
EugeneApr 25–May 9
GreshamMar 30–Apr 13
HillsboroApr 30–May 14
BendJun 20–Jul 4
BeavertonApr 15–Apr 29
MedfordApr 22–May 6
CorvallisMay 1–May 15
SpringfieldApr 25–May 9
TigardApr 15–Apr 29
AlbanyMay 1–May 15
AlohaFeb 25–Mar 11
Lake OswegoApr 1–Apr 15
Grants PassApr 22–May 6
KeizerApr 17–May 1
RedmondJun 23–Jul 7
Oregon CityApr 1–Apr 15
McMinnvilleApr 19–May 3
WoodburnMar 30–Apr 13
BethanyFeb 25–Mar 11
Happy ValleyApr 1–Apr 15
TualatinApr 15–Apr 29
WilsonvilleApr 1–Apr 15
Forest GroveApr 30–May 14
NewbergApr 4–Apr 18
West LinnApr 1–Apr 15
RoseburgApr 6–Apr 20
HayesvilleApr 17–May 1
MilwaukieMar 11–Mar 25
All 34 cities
CitySow outdoorsLast frost
PortlandMar 11 to Mar 25Feb 25
SalemApr 17 to May 1Apr 3
EugeneApr 25 to May 9Apr 11
GreshamMar 30 to Apr 13Mar 16
HillsboroApr 30 to May 14Apr 16
BendJun 20 to Jul 4Jun 6
BeavertonApr 15 to Apr 29Apr 1
MedfordApr 22 to May 6Apr 8
CorvallisMay 1 to May 15Apr 17
SpringfieldApr 25 to May 9Apr 11
TigardApr 15 to Apr 29Apr 1
AlbanyMay 1 to May 15Apr 17
AlohaFeb 25 to Mar 11Feb 11
Lake OswegoApr 1 to Apr 15Mar 18
Grants PassApr 22 to May 6Apr 8
KeizerApr 17 to May 1Apr 3
RedmondJun 23 to Jul 7Jun 9
Oregon CityApr 1 to Apr 15Mar 18
McMinnvilleApr 19 to May 3Apr 5
WoodburnMar 30 to Apr 13Mar 16
BethanyFeb 25 to Mar 11Feb 11
Happy ValleyApr 1 to Apr 15Mar 18
TualatinApr 15 to Apr 29Apr 1
WilsonvilleApr 1 to Apr 15Mar 18
Forest GroveApr 30 to May 14Apr 16
NewbergApr 4 to Apr 18Mar 21
West LinnApr 1 to Apr 15Mar 18
RoseburgApr 6 to Apr 20Mar 23
HayesvilleApr 17 to May 1Apr 3
MilwaukieMar 11 to Mar 25Feb 25
Klamath FallsJun 23 to Jul 7Jun 9
AshlandMay 20 to Jun 3May 6
SherwoodApr 4 to Apr 18Mar 21
LebanonMar 28 to Apr 11Mar 14

In Bend, Redmond, Klamath Falls the frost-free season is shorter than pumpkins need. Start plants indoors and pick early varieties.

Questions

When should I plant pumpkins in Oregon?

In Portland, sow outdoors from March 11 to March 25. Across Oregon the window opens between February 25 and June 23, depending on the local last frost.

How is this date worked out?

Sow outdoors 2–4 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

Is the season long enough for pumpkins everywhere in Oregon?

Not quite. In Bend, Redmond, Klamath Falls the frost-free season is shorter than the time pumpkins need to ripen. Start plants indoors and pick an early variety.

More for Oregon

Pumpkins in other states

Frost dates for every city in Oregon