What to Plant in August — Zone 9

August 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.

🥬 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

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 August in zone 9?

3 crops can go in the ground: cabbage, broccoli, cauliflower. Exact windows are in the tables above — early and late in the month can differ by a full frost date.

Is August 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.

August in other zones

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

Zone 9, month by month

← July September → All months

Zone 9 frost dates near you

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