In Illinois, the spinach season typically runs mid-April to mid-June, and again early September to mid-November, with peak availability early May through late May. Exact weeks shift a little with each year's weather.
Can I pick my own spinach in Illinois?
Rarely offered u-pick; buy same-day cut bunches at spring and fall market stalls. The best market weeks are early May through late May.
How long does spinach season last in Illinois?
about 19 weeks end to end — mid-April to mid-June, and again early September to mid-November. The early and late shoulders are real but lighter; the solid stretch of chalk on the band is the sure bet.