September · Early autumn
What to sow in September in Chicago
22 crops are in their window this month in Chicago — timed to your local frost dates.
Last frost≈ 17 Apr
First frost≈ 30 Oct
Frost-free days59 days
September averages62°–75°F
Vegetables
19 in season
Amaranth Greens
Direct sow · pinch tips often for a steady flush of tender greens
Arugula
Direct sow · sow every 2-3 weeks for a steady peppery harvest
Bok Choy
Direct sow · fall crops resist bolting better than spring ones
Choy Sum
Direct sow · cut flowering stems young for the most tender bite
Daikon Radish
Direct sow · cold weather sweetens the roots after a light frost
