What to Plant in September — Zone 9

September sits inside zone 9's frost-free season (Feb 20 – Dec 1) — everything on this page can go straight into warm soil.

Fall planting — Counted back from the first fall frost.

🫛 Peas Sep 22 – Oct 6 55–70 days to maturity
🥬 Kale Sep 8 – Sep 22 55–65 days to maturity
🌈 Swiss Chard Sep 22 – Oct 6 50–60 days to maturity
🍃 Collard Greens Sep 8 – Sep 22 60–75 days to maturity
🥬 Cabbage Aug 25 – Sep 8 65–85 days to maturity
🥦 Broccoli Aug 25 – Sep 8 60–75 days to maturity
🥦 Cauliflower Aug 25 – Sep 8 60–80 days to maturity
🥬 Kohlrabi Sep 22 – Oct 6 45–60 days to maturity
🥕 Carrots Sep 8 – Sep 22 60–75 days to maturity
🫒 Beets Sep 22 – Oct 6 50–65 days to maturity
🥔 Turnips Sep 22 – Oct 6 40–55 days to maturity
🫘 Green Beans (Bush) Sep 22 – Oct 6 50–60 days to maturity

Windows use zone 9's typical frost dates (Feb 20 / Dec 1). For your own city's dates, run the frost lookup — the planting calendar then localizes everything automatically.

Frequently asked questions

What can I plant outside in September in zone 9?

12 crops can go in the ground: peas, kale, swiss chard, collard greens, cabbage, broccoli, cauliflower, kohlrabi, and 4 more. Exact windows are in the tables above — early and late in the month can differ by a full frost date.

Is September the right time for tomatoes in zone 9?

The spring window has passed; tomatoes set out this late won't beat the Dec 1 average first frost to ripeness. Plan for next spring's seed-starting instead.

September in other zones

Zone 1Zone 2Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9Zone 10Zone 11Zone 12Zone 13

Zone 9, month by month

← August October → All months

Zone 9 frost dates near you

Mobile, ALPhoenix, AZTucson, AZSacramento, CAFresno, CAJacksonville, FLSavannah, GANew Orleans, LA