September · Early autumn
What to sow in September in Seattle
26 crops are in their window this month in Seattle — timed to your local frost dates.
Last frost≈ 11 Apr
First frost≈ 30 Oct
Frost-free days59 days
September averages55°–72°F
Vegetables
23 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
Beets
Direct sow · soak seed clusters overnight to speed germination
Bok Choy
Direct sow · fall crops resist bolting better than spring ones
Chicory & Endive
Direct sow · blanch leaves to mellow their bitter edge
