What to Plant in March — Zone 2

March ends about 9 weeks before zone 2's average last frost (May 30) — prime seed-starting territory.

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

🧅 Onions Mar 21 – Apr 4 90–110 days to maturity
🧅 Leeks Mar 21 – Apr 4 100–120 days to maturity
🥬 Celery Mar 21 – Apr 4 100–120 days to maturity
🫑 Peppers Mar 21 – Apr 4 60–90 days to maturity
🍆 Eggplant Mar 21 – Apr 4 65–80 days to maturity
🌿 Parsley Mar 21 – Apr 4 70–90 days to maturity
🌿 Thyme Mar 21 – Apr 4 90–120 days to maturity

Windows use zone 2's typical frost dates (May 30 / Sep 8). 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 2?

Nothing goes outside yet in zone 2 — March is for starting seeds indoors (onions, leeks, celery, peppers, eggplant, parsley, thyme). Outdoor planting opens closer to the May 30 average last frost.

What seeds should I start indoors in March in zone 2?

Onions, leeks, celery, peppers, eggplant, parsley, thyme — each is counted back from zone 2's average last frost around May 30, so transplants are ready exactly when the garden is.

Is March the right time for tomatoes in zone 2?

Not yet — zone 2 tomatoes start indoors roughly 8–6 weeks before the May 30 last frost and transplant just after it.