🧅 Can I Plant Green Onion in Baton Rouge, LA?

2026 planting guide for Zone 9a · Last frost ~February 22 · Growing season ~282 days

✅ YES — Good temps, but watch for heat — highs near 91°F

Temperature conditions are suitable for Green Onion. Highs near 91°F are on the warm side — make sure plants have plenty of water.

Planting window: May 25 – Jun 8
Good to go — plant now while conditions are right.
Live result based on current forecast for Baton Rouge, LA · Updates every 6 hours
USDA Zone
9a
Last Spring Frost
~February 22
First Fall Frost
November 30
Growing Season
~282 days
Ideal Temp for Green Onion
50–80°F
Frost Risk
✅ Tolerant

Growing Green Onion in Baton Rouge

Baton Rouge's Zone 9a subtropical climate along the Mississippi River allows a growing season of roughly 280 days. The hot, humid summers support heat-tolerant crops like okra, sweet potatoes, and Southern peas, though fungal pressure is significant year-round. Two distinct windows — spring (February–May) and fall (September–December) — are the prime growing seasons. Mild winters allow cool-season vegetables to produce abundantly.

In Baton Rouge (last frost around February 22), green onion can go out around January — 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 Baton Rouge, LA?

In Baton Rouge (last frost around February 22), green onion can go out around January — 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 Baton Rouge?

Baton Rouge, LA is in USDA Plant Hardiness Zone 9a. The last expected spring frost is around February 22, and the first fall frost arrives around November 30. 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 Baton Rouge 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 Baton Rouge 2026?

Yes — Green Onion grows well in Baton Rouge, LA. With a Zone 9a climate and a growing season of ~282 days, Baton Rouge 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.

Grow Green Onion in Other Cities

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