What to Plant in September — Zone 8

September sits inside zone 8's frost-free season (Mar 15 – Nov 15) — everything on this page can go straight into warm soil.

Fall planting — Counted back from the first fall frost.

🫛 Peas Sep 6 – Sep 20 55–70 days to maturity
🥬 Lettuce Sep 20 – Oct 18 45–60 days to maturity
🍃 Spinach Sep 20 – Oct 4 40–50 days to maturity
🥬 Kale Aug 23 – Sep 6 55–65 days to maturity
🌈 Swiss Chard Sep 6 – Sep 20 50–60 days to maturity
🍃 Collard Greens Aug 23 – Sep 6 60–75 days to maturity
🥬 Kohlrabi Sep 6 – Sep 20 45–60 days to maturity
🥕 Carrots Aug 23 – Sep 6 60–75 days to maturity
🫒 Beets Sep 6 – Sep 20 50–65 days to maturity
🥔 Turnips Sep 6 – Sep 20 40–55 days to maturity
🧅 Scallions Sep 20 – Oct 4 60–70 days to maturity
🥬 Bok Choy Sep 20 – Oct 4 45–55 days to maturity
🌿 Mustard Greens Sep 20 – Oct 4 35–45 days to maturity
🫘 Green Beans (Bush) Sep 6 – Sep 20 50–60 days to maturity
🌿 Cilantro Sep 20 – Oct 4 45–55 days to maturity
🌾 Dill Sep 20 – Oct 4 40–55 days to maturity

Windows use zone 8's typical frost dates (Mar 15 / Nov 15). 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 8?

16 crops can go in the ground: peas, lettuce, spinach, kale, swiss chard, collard greens, kohlrabi, carrots, and 8 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 8?

The spring window has passed; tomatoes set out this late won't beat the Nov 15 average first frost to ripeness. Plan for next spring's seed-starting instead.