What to Plant in December — Zone 9

Start seeds indoors — Counted back from the last frost so transplants are ready on time.

🥬 Cabbage	Dec 26 – Jan 9	65–85 days to maturity
🧅 Onions	Dec 12 – Dec 26	90–110 days to maturity
🧅 Leeks	Dec 12 – Dec 26	100–120 days to maturity
🥬 Celery	Dec 12 – Dec 26	100–120 days to maturity
🍅 Tomatoes	Dec 26 – Jan 9	60–85 days to maturity
🫑 Peppers	Dec 12 – Dec 26	60–90 days to maturity
🍆 Eggplant	Dec 12 – Dec 26	65–80 days to maturity
🍏 Tomatillos	Dec 26 – Jan 9	70–80 days to maturity
🌿 Parsley	Dec 12 – Dec 26	70–90 days to maturity
🌱 Chives	Dec 26 – Jan 9	75–85 days to maturity
🌿 Thyme	Dec 12 – Dec 26	90–120 days to maturity
🌿 Oregano	Dec 26 – Jan 9	80–90 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.