What to Plant in September in Zone 10: Tomatoes, Peppers, Beans, and Squash
In USDA zone 10, September is still a warm-season sowing and transplant month for tomatoes, peppers, beans, squash, cucumbers, herbs, and heat-loving flow...
Published by ThriveThyme
September Zone 10 September zone 10 fall planting
What to Plant in September in Zone 10
In USDA zone 10, September is still a warm-season sowing and transplant month. Tomatoes, peppers, beans, squash, and cucumbers stay on the calendar. Keep herbs and heat-loving flowers going. Cool-season greens and brassicas strengthen mid to late October as nights ease.
Typical first frost for zone 10 averages around late December (about December 30). Confirm your date with the first frost guide and the first-frost lookup. Also check the zone 10 September calendar and what to plant now.
Sow or Transplant Now
- Tomatoes (cherry, roma, beefsteak, heirloom): sow or transplant while the warm-season window is open. Tomato.
- Peppers (jalapeno, cayenne, banana, poblano, and sweet types): set out transplants or finish sowings that still fit the catalog window. Pepper.
- Beans and pole beans: direct-sow for a late warm-season crop. Bean.
- Squash, including acorn and yellow summer squash: sow where the cultivar has enough mild weather ahead. Squash.
- Cucumbers: direct-sow or transplant while heat still supports vines. Cucumber.
- Herbs: basil, oregano, rosemary, sage, thyme, tarragon, and marjoram. Keep moisture steady on new starts.
- Flowers: zinnia, cosmos, sunflower, and morning glory for late color.
Look Ahead to Cool Season
Early October often wraps remaining warm-season sowings. Mid to late October favors cool-season greens, roots, and brassicas. Use what to plant in October in zone 10 and the zone 10 October calendar. Nearby: September zone 9 and September zone 8.
Wait on Garlic
In zones 9 to 10, garlic is usually later than September — often late November through January, with softnecks and pre-chilling common in mild winters. Prepare a well-drained bed now, but wait for cooler soil. Garlic timing by zone.
Next Steps
Keep warm-season beds watered and harvested while the catalog windows stay open, then hand off to cool-season sowings as October windows open. Compare October zone 9 and October zone 10.