Growing Green Onion in Zone 8a

Zone 8a has warm winters and an extended growing season — excellent for heat-loving crops like Green Onion. Last frost: Apr 5. First frost: Oct 28.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 22Oct 28

Season: Apr 5 – Oct 28 (206 days) · Succession: plant every 3 weeks (up to 6x)

Zone8a

Last FrostApr 5

First FrostOct 28

Season Length206 days

Days to Harvest65

Sunfull-to-part

Frost ToleranceHeavy

Spacing16/sqft (3" apart)

When to Plant Green Onion in Zone 8a

Start Seeds Indoors: Feb 22

Start Green Onion seeds indoors around Feb 22 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.

Transplant Outdoors: Mar 22

Transplant Green Onion seedlings outdoors after Mar 22. 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 1

First harvest approximately May 1 (~40 days from transplant). Continue harvesting until first frost (Oct 28). Green Onion can overwinter in mild climates for continued harvest.

Fall Planting: Sep 2

For a fall harvest, plant Green Onion around Sep 2 (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 8a?

Start Green Onion seeds indoors around Feb 22. Transplant outdoors after Mar 22. Expect first harvest around May 1.

What is the last frost date for Zone 8a?

The average last spring frost date for Zone 8a is Apr 5. The first fall frost averages Oct 28, giving a 206-day growing season.

Can I grow Green Onion in Zone 8a?

Yes. Green Onion needs 65 days to harvest. Zone 8a has a 206-day growing season, which is sufficient. You can plant up to 6 successions.

What is the best month to plant Green Onion in Zone 8a?

The best time to start Green Onion in Zone 8a is Feb. Begin seeds indoors around Feb 22, then transplant outdoors after the last frost date of Apr 5.

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 8a, expect your first harvest around May 1.

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