Growing Green Onion in Zone 6b

Zone 6b has mild winters and a long growing season — good conditions for Green Onion. Last frost: Apr 15. First frost: Oct 22.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 4Oct 22

Season: Apr 15 – Oct 22 (190 days) · Succession: plant every 3 weeks (up to 5x)

Zone6b

Last FrostApr 15

First FrostOct 22

Season Length190 days

Days to Harvest65

Sunfull-to-part

Frost ToleranceHeavy

Spacing16/sqft (3" apart)

When to Plant Green Onion in Zone 6b

Start Seeds Indoors: Mar 4

Start Green Onion seeds indoors around Mar 4 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.

Transplant Outdoors: Apr 1

Transplant Green Onion seedlings outdoors after Apr 1. Wait until soil temperature reaches 40°F. Space plants at 16/sqft (3" apart). Harden off plants for a week before moving outside.

Harvest: May 11

First harvest approximately May 11 (~40 days from transplant). Continue harvesting until first frost (Oct 22). Green Onion can overwinter in mild climates for continued harvest.

Fall Planting: Aug 27

For a fall harvest, plant Green Onion around Aug 27 (8 weeks before first frost).

Companion Planting

✅ Carrot ✅ Beet ✅ Lettuce ✅ Tomato✅ Pepper✅ Cabbage✅ Strawberries

❌ Bean❌ Pea

Green Onion in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Green Onion in Zone 6b?

Start Green Onion seeds indoors around Mar 4. Transplant outdoors after Apr 1. Expect first harvest around May 11.

What is the last frost date for Zone 6b?

The average last spring frost date for Zone 6b is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.

Can I grow Green Onion in Zone 6b?

Yes. Green Onion needs 65 days to harvest. Zone 6b has a 190-day growing season, which is sufficient. You can plant up to 5 successions.

What is the best month to plant Green Onion in Zone 6b?

The best time to start Green Onion in Zone 6b is Mar. Begin seeds indoors around Mar 4, then transplant outdoors after the last frost date of Apr 15.

What companion plants grow well with Green Onion?

Good companion plants for Green Onion include Carrot, Beet, Lettuce, Tomato, Pepper, Cabbage. Avoid planting Green Onion near Bean, Pea.

How long does Green Onion take to harvest?

Green Onion takes approximately 65 days from planting to harvest. In Zone 6b, expect your first harvest around May 11.

Plan Your Green Onion Garden

Track Green Onion from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Green Onion Growing Guide