FrostCal

When to Plant Winter Squash in Oregon

In a typical Oregon location, start seeds indoors Mar 6 – Mar 13, then sow outdoors Apr 10 – Apr 24, then transplant outdoors Apr 10 – Apr 17. Across the state, the outdoor planting window starts as early as Feb 18 in Beaverton and as late as Jun 16 in Altamont.

Method Direct sow
Days to maturity 80–110 days

Long season; direct sow after soil warms, or start indoors 3-4 weeks before last frost in short-season climates.

Winter Squash Planting Dates by City

CityStart indoorsDirect sowTransplant
PortlandJan 28 – Feb 4Mar 4 – Mar 18Mar 4 – Mar 11
EugeneMar 14 – Mar 21Apr 18 – May 2Apr 18 – Apr 25
SalemMar 6 – Mar 13Apr 10 – Apr 24Apr 10 – Apr 17
GreshamFeb 16 – Feb 23Mar 23 – Apr 6Mar 23 – Mar 30
HillsboroMar 19 – Mar 26Apr 23 – May 7Apr 23 – Apr 30
BeavertonJan 14 – Jan 21Feb 18 – Mar 4Feb 18 – Feb 25
BendMay 9 – May 16Jun 13 – Jun 27Jun 13 – Jun 20
MedfordMar 11 – Mar 18Apr 15 – Apr 29Apr 15 – Apr 22
SpringfieldMar 14 – Mar 21Apr 18 – May 2Apr 18 – Apr 25
CorvallisMar 20 – Mar 27Apr 24 – May 8Apr 24 – May 1
AlbanyMar 20 – Mar 27Apr 24 – May 8Apr 24 – May 1
TigardMar 4 – Mar 11Apr 8 – Apr 22Apr 8 – Apr 15
AlohaJan 14 – Jan 21Feb 18 – Mar 4Feb 18 – Feb 25
Lake OswegoFeb 18 – Feb 25Mar 25 – Apr 8Mar 25 – Apr 1
KeizerMar 6 – Mar 13Apr 10 – Apr 24Apr 10 – Apr 17
Grants PassMar 11 – Mar 18Apr 15 – Apr 29Apr 15 – Apr 22
Oregon CityFeb 18 – Feb 25Mar 25 – Apr 8Mar 25 – Apr 1
McMinnvilleMar 8 – Mar 15Apr 12 – Apr 26Apr 12 – Apr 19
RedmondMay 12 – May 19Jun 16 – Jun 30Jun 16 – Jun 23
TualatinMar 4 – Mar 11Apr 8 – Apr 22Apr 8 – Apr 15
West LinnFeb 18 – Feb 25Mar 25 – Apr 8Mar 25 – Apr 1
WoodburnFeb 16 – Feb 23Mar 23 – Apr 6Mar 23 – Mar 30
Forest GroveMar 19 – Mar 26Apr 23 – May 7Apr 23 – Apr 30
NewbergFeb 21 – Feb 28Mar 28 – Apr 11Mar 28 – Apr 4
WilsonvilleFeb 18 – Feb 25Mar 25 – Apr 8Mar 25 – Apr 1
RoseburgFeb 23 – Mar 2Mar 30 – Apr 13Mar 30 – Apr 6
Klamath FallsMay 12 – May 19Jun 16 – Jun 30Jun 16 – Jun 23
AshlandApr 8 – Apr 15May 13 – May 27May 13 – May 20
MilwaukieJan 28 – Feb 4Mar 4 – Mar 18Mar 4 – Mar 11
BethanyMar 19 – Mar 26Apr 23 – May 7Apr 23 – Apr 30

Showing the 30 most populous of 68 Oregon cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Oregon cities.

Frequently Asked Questions

When should I plant winter squash in Oregon?

In a typical Oregon location, start seeds indoors Mar 6 – Mar 13, then sow outdoors Apr 10 – Apr 24, then transplant outdoors Apr 10 – Apr 17. Across the state, the outdoor planting window starts as early as Feb 18 in Beaverton and as late as Jun 16 in Altamont.

When is the last frost in Oregon?

The average last spring frost in Oregon ranges from February 11 in Beaverton to June 9 in Altamont, based on NOAA 1991–2020 climate normals.

How long do winter squash take to grow?

Winter Squash typically take 80–110 days from planting to harvest. Long season; direct sow after soil warms, or start indoors 3-4 weeks before last frost in short-season climates.

Other Crops in Oregon

When to plant winter squash in other states

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