🧅 Can I Plant Green Onion in Baltimore, MD?
Temperature conditions are suitable for Green Onion. Highs near 90°F are on the warm side — make sure plants have plenty of water.
Growing Green Onion in Baltimore
Baltimore's Zone 7b Mid-Atlantic climate offers around 230 frost-free days — one of the longer seasons in the Northeast. The Chesapeake Bay moderates temperatures, and the city's urban core often runs a week or two warmer than surrounding suburbs. Tomatoes, peppers, and eggplant do especially well here, and the long fall window allows excellent brassica crops.
In Baltimore (last frost around March 28), green onion can go out around February — approximately 4 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 8 weeks before the last frost date gives you a significant head start.
Green Onion thrives between 50°F and 80°F. It tolerates temperatures as low as 35°F, making it a candidate for early spring planting before the last frost date. Expect 60–80 days from transplant to first harvest. Easy and fast. Direct sow in early spring or fall. Harvest young.
Frequently Asked Questions
When can I plant green onion in Baltimore, MD?
In Baltimore (last frost around March 28), green onion can go out around February — approximately 4 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 8 weeks before that — giving you strong transplants ready to go out at the right time.
What is the USDA hardiness zone for Baltimore?
Baltimore, MD is in USDA Plant Hardiness Zone 7b. The last expected spring frost is around March 28, and the first fall frost arrives around November 13. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant green onion outside in Baltimore right now?
That depends on the current weather forecast. Green Onion needs temperatures above 35°F (ideally 50–80°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.
Can I grow green onion in Baltimore 2026?
Yes — Green Onion grows well in Baltimore, MD. With a Zone 7b climate and a growing season of ~230 days, Baltimore is well-suited for warm-season crops like green onion. As a frost-tolerant crop, green onion can even go out a few weeks before the last frost date.
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