September · Early autumn
What to sow in September in Houston
12 crops are in their window this month in Houston — timed to your local frost dates.
Last frost≈ 5 Mar
First frost≈ 15 Nov
Frost-free days75 days
September averages74°–91°F
Vegetables
9 in season
Amaranth Greens
Direct sow · pinch tips often for a steady flush of tender greens
Bitter Melon
Start indoors · harvest young and green — riper fruit turns bitter
Cucumbers
Direct sow · trellis vines to save space and straighten fruit
Molokhia (Egyptian Spinach)
Direct sow · pick shoots young; older leaves turn tough
Okra
Direct sow · harvest pods young and often to keep plants producing
