FrostCal

When to Plant Brussels Sprouts in Washington

In a typical Washington location, start seeds indoors Feb 3 – Feb 17, then transplant outdoors Mar 3 – Mar 17. Across the state, the outdoor planting window starts as early as Feb 8 in Port Townsend and as late as May 9 in Cheney.

Method Start indoors, then transplant
Days to maturity 90–110 days

Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost.

Brussels Sprouts Planting Dates by City

CityStart indoorsTransplant
SeattleJan 23 – Feb 6Feb 20 – Mar 6
Tri-CitiesMar 9 – Mar 23Apr 6 – Apr 20
SpokaneMar 8 – Mar 22Apr 5 – Apr 19
TacomaJan 18 – Feb 1Feb 15 – Mar 1
VancouverFeb 8 – Feb 22Mar 8 – Mar 22
BellevueJan 18 – Feb 1Feb 15 – Mar 1
KentJan 30 – Feb 13Feb 27 – Mar 13
EverettFeb 3 – Feb 17Mar 3 – Mar 17
RentonJan 23 – Feb 6Feb 20 – Mar 6
Federal WayJan 18 – Feb 1Feb 15 – Mar 1
Spokane ValleyMar 8 – Mar 22Apr 5 – Apr 19
YakimaMar 20 – Apr 3Apr 17 – May 1
KirklandJan 18 – Feb 1Feb 15 – Mar 1
BellinghamFeb 11 – Feb 25Mar 11 – Mar 25
KennewickFeb 7 – Feb 21Mar 7 – Mar 21
AuburnJan 30 – Feb 13Feb 27 – Mar 13
PascoFeb 7 – Feb 21Mar 7 – Mar 21
MarysvilleFeb 3 – Feb 17Mar 3 – Mar 17
RedmondJan 18 – Feb 1Feb 15 – Mar 1
LakewoodJan 21 – Feb 4Feb 18 – Mar 4
OlympiaMar 11 – Mar 25Apr 8 – Apr 22
ShorelineJan 18 – Feb 1Feb 15 – Mar 1
RichlandFeb 16 – Mar 2Mar 16 – Mar 30
South HillFeb 21 – Mar 7Mar 21 – Apr 4
SammamishJan 18 – Feb 1Feb 15 – Mar 1
BurienJan 12 – Jan 26Feb 9 – Feb 23
LaceyMar 11 – Mar 25Apr 8 – Apr 22
City of SammamishFeb 9 – Feb 23Mar 9 – Mar 23
BothellJan 18 – Feb 1Feb 15 – Mar 1
EdmondsJan 19 – Feb 2Feb 16 – Mar 2

Showing the 30 most populous of 133 Washington cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Washington cities.

Frequently Asked Questions

When should I plant Brussels sprouts in Washington?

In a typical Washington location, start seeds indoors Feb 3 – Feb 17, then transplant outdoors Mar 3 – Mar 17. Across the state, the outdoor planting window starts as early as Feb 8 in Port Townsend and as late as May 9 in Cheney.

When is the last frost in Washington?

The average last spring frost in Washington ranges from March 1 in Port Townsend to May 30 in Cheney, based on NOAA 1991–2020 climate normals.

How long do Brussels sprouts take to grow?

Brussels Sprouts typically take 90–110 days from planting to harvest. Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost.

Other Crops in Washington

When to plant Brussels sprouts in other states

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