In Washington, the brussels sprout season typically runs mid-August to mid-December, with peak availability mid-September through mid-November. Exact weeks shift a little with each year's weather.
Can I pick my own brussels sprouts in Washington?
Rarely u-pick — look for whole stalks at fall farmers markets and farm stands instead. The best market weeks are mid-September through mid-November.
How long does brussels sprout season last in Washington?
about 17 weeks end to end — mid-August to mid-December. The early and late shoulders are real but lighter; the solid stretch of chalk on the band is the sure bet.