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Korean Small Onion illustration

Growing Korean Small Onion in Zone 10a

Zone 10a has a year-round growing season. Korean Small Onion can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.

Planting Calendar

Outdoor
Harvest
Jan 23Dec 1

Season: Feb 20 – Dec 1 (284 days)

Zone10a
Last FrostFeb 20
First FrostDec 1
Season Length284 days
Days to Harvest65
SunFull Sun
Frost ToleranceHeavy
Spacing16/sqft (3" apart)

When to Plant Korean Small Onion in Zone 10a

Harvest: Mar 4

First harvest approximately Mar 4 (~40 days from transplant). Continue harvesting until first frost (Dec 1). Korean Small Onion can overwinter in mild climates for continued harvest.

Fall Planting: Oct 20

For a fall harvest, plant Korean Small Onion around Oct 20 (6 weeks before first frost).

Companion Planting

✅ Carrot✅ Beet✅ Lettuce
❌ Bean❌ Pea

Korean Small 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

Plan Your Korean Small Onion Garden

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

Start Free Korean Small Onion Growing Guide