September · Early autumn
What to sow in September in Portland
20 crops are in their window this month in Portland — timed to your local frost dates.
Last frost≈ 23 Mar
First frost≈ 28 Oct
Frost-free days57 days
September averages56°–74°F
Vegetables
17 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
