FrostCal

When to Plant Broccoli in Washington

In a typical Washington location, start seeds indoors Feb 3 – Feb 17, then transplant outdoors Mar 3 – Mar 10. Across the state, the outdoor planting window starts as early as Feb 8 in Port Townsend and as late as May 9 in Cheney. For a fall crop, plant around Sep 8 – Sep 15.

Method Start indoors, then transplant
Days to maturity 55–80 days

Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost).

Broccoli Planting Dates by City

CityStart indoorsTransplantFall planting
SeattleJan 23 – Feb 6Feb 20 – Feb 27Sep 15 – Sep 22
Tri-CitiesMar 9 – Mar 23Apr 6 – Apr 13Aug 9 – Aug 16
SpokaneMar 8 – Mar 22Apr 5 – Apr 12Aug 13 – Aug 20
TacomaJan 18 – Feb 1Feb 15 – Feb 22Sep 12 – Sep 19
VancouverFeb 8 – Feb 22Mar 8 – Mar 15Sep 7 – Sep 14
BellevueJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
KentJan 30 – Feb 13Feb 27 – Mar 6Sep 8 – Sep 15
EverettFeb 3 – Feb 17Mar 3 – Mar 10Aug 31 – Sep 7
RentonJan 23 – Feb 6Feb 20 – Feb 27Sep 14 – Sep 21
Federal WayJan 18 – Feb 1Feb 15 – Feb 22Sep 12 – Sep 19
Spokane ValleyMar 8 – Mar 22Apr 5 – Apr 12Aug 13 – Aug 20
YakimaMar 20 – Apr 3Apr 17 – Apr 24Aug 2 – Aug 9
KirklandJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
BellinghamFeb 11 – Feb 25Mar 11 – Mar 18Aug 31 – Sep 7
KennewickFeb 7 – Feb 21Mar 7 – Mar 14Aug 28 – Sep 4
AuburnJan 30 – Feb 13Feb 27 – Mar 6Sep 8 – Sep 15
PascoFeb 7 – Feb 21Mar 7 – Mar 14Aug 28 – Sep 4
MarysvilleFeb 3 – Feb 17Mar 3 – Mar 10Aug 31 – Sep 7
RedmondJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
LakewoodJan 21 – Feb 4Feb 18 – Feb 25Sep 19 – Sep 26
OlympiaMar 11 – Mar 25Apr 8 – Apr 15Aug 12 – Aug 19
ShorelineJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
RichlandFeb 16 – Mar 2Mar 16 – Mar 23Aug 22 – Aug 29
South HillFeb 21 – Mar 7Mar 21 – Mar 28Aug 28 – Sep 4
SammamishJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
BurienJan 12 – Jan 26Feb 9 – Feb 16Sep 21 – Sep 28
LaceyMar 11 – Mar 25Apr 8 – Apr 15Aug 12 – Aug 19
City of SammamishFeb 9 – Feb 23Mar 9 – Mar 16Sep 5 – Sep 12
BothellJan 18 – Feb 1Feb 15 – Feb 22Sep 21 – Sep 28
EdmondsJan 19 – Feb 2Feb 16 – Feb 23Sep 15 – Sep 22

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 broccoli in Washington?

In a typical Washington location, start seeds indoors Feb 3 – Feb 17, then transplant outdoors Mar 3 – Mar 10. Across the state, the outdoor planting window starts as early as Feb 8 in Port Townsend and as late as May 9 in Cheney. For a fall crop, plant around Sep 8 – Sep 15.

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 broccoli take to grow?

Broccoli typically take 55–80 days from planting to harvest. Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost).

Other Crops in Washington

When to plant broccoli in other states

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