What to Plant in March — Zone 7

March is the pivot month in zone 7: the average last frost lands around Mar 30. Hardy crops go out all month; tender ones wait for the far side of that date.

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

🥬 Lettuce	Feb 16 – Mar 2	45–60 days to maturity
🥬 Kale	Feb 16 – Mar 2	55–65 days to maturity
🌈 Swiss Chard	Feb 23 – Mar 9	50–60 days to maturity
🍃 Collard Greens	Feb 16 – Mar 2	60–75 days to maturity
🥬 Brussels Sprouts	Feb 16 – Mar 2	90–110 days to maturity
🥒 Cucumbers	Mar 2 – Mar 9	50–70 days to maturity
🥒 Zucchini	Mar 2 – Mar 9	45–60 days to maturity
🎃 Winter Squash	Mar 2 – Mar 9	85–110 days to maturity
🎃 Pumpkins	Mar 2 – Mar 9	90–110 days to maturity
🍉 Watermelon	Mar 2 – Mar 9	75–95 days to maturity
🍈 Cantaloupe	Mar 2 – Mar 9	75–90 days to maturity
🌶️ Okra	Mar 2 – Mar 9	55–65 days to maturity
🌿 Basil	Feb 16 – Mar 2	30–60 days to maturity
🌸 Zinnias	Mar 2 – Mar 9	60–70 days to maturity
🏵️ Marigolds	Feb 16 – Mar 2	50–60 days to maturity

Transplant outdoors — Set out sturdy transplants during these windows.

🥬 Lettuce	Mar 2 – Mar 16	45–60 days to maturity
🥬 Kale	Mar 2 – Mar 16	55–65 days to maturity
🌈 Swiss Chard	Mar 16 – Mar 30	50–60 days to maturity
🍃 Collard Greens	Mar 2 – Mar 16	60–75 days to maturity
🥬 Cabbage	Mar 2 – Mar 16	65–85 days to maturity
🥦 Broccoli	Mar 9 – Mar 23	60–75 days to maturity
🥦 Cauliflower	Mar 16 – Mar 30	60–80 days to maturity
🥬 Brussels Sprouts	Mar 30 – Apr 13	90–110 days to maturity
🧅 Onions	Feb 16 – Mar 2	90–110 days to maturity
🧅 Leeks	Mar 2 – Mar 16	100–120 days to maturity
🥬 Celery	Mar 30 – Apr 13	100–120 days to maturity
🌿 Parsley	Mar 16 – Mar 30	70–90 days to maturity
🌱 Chives	Mar 16 – Mar 30	75–85 days to maturity
🌿 Thyme	Mar 30 – Apr 13	90–120 days to maturity
🌿 Oregano	Mar 30 – Apr 13	80–90 days to maturity

Direct sow — Seeds straight into garden soil.

🫛 Peas	Feb 16 – Mar 2	55–70 days to maturity
🥬 Lettuce	Mar 2 – Mar 30	45–60 days to maturity
🍃 Spinach	Feb 16 – Mar 2	40–50 days to maturity
🥬 Kale	Mar 2 – Mar 16	55–65 days to maturity
🌿 Arugula	Feb 23 – Mar 9	30–40 days to maturity
🌈 Swiss Chard	Mar 16 – Mar 30	50–60 days to maturity
🍃 Collard Greens	Mar 16 – Mar 30	60–75 days to maturity
🥬 Kohlrabi	Mar 2 – Mar 16	45–60 days to maturity
🥕 Carrots	Mar 9 – Mar 30	60–75 days to maturity
🫒 Beets	Mar 2 – Mar 16	50–65 days to maturity
🌶️ Radishes	Feb 23 – Mar 9	22–30 days to maturity
🥔 Turnips	Mar 2 – Mar 16	40–55 days to maturity
🥕 Parsnips	Mar 9 – Mar 30	100–120 days to maturity
🧅 Onions	Mar 2 – Mar 16	90–110 days to maturity
🧅 Scallions	Mar 2 – Mar 16	60–70 days to maturity
🥔 Potatoes	Mar 2 – Mar 16	70–100 days to maturity
🥬 Bok Choy	Mar 9 – Mar 23	45–55 days to maturity
🌿 Mustard Greens	Mar 2 – Mar 16	35–45 days to maturity
🌿 Cilantro	Mar 9 – Mar 23	45–55 days to maturity
🌿 Parsley	Mar 16 – Mar 30	70–90 days to maturity
🌾 Dill	Mar 16 – Mar 30	40–55 days to maturity
🌱 Chives	Mar 16 – Mar 30	75–85 days to maturity

Windows use zone 7's typical frost dates (Mar 30 / Nov 3). 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 March in zone 7?

30 crops can go in the ground: lettuce, kale, swiss chard, collard greens, cabbage, broccoli, cauliflower, brussels sprouts, and 22 more. Exact windows are in the tables above — early and late in the month can differ by a full frost date.

What seeds should I start indoors in March in zone 7?

Lettuce, kale, swiss chard, collard greens, brussels sprouts, cucumbers, zucchini, winter squash, and 7 more — each is counted back from zone 7's average last frost around Mar 30, so transplants are ready exactly when the garden is.

Is March the right time for tomatoes in zone 7?

Not yet — zone 7 tomatoes start indoors roughly 8–6 weeks before the Mar 30 last frost and transplant just after it.