Korean Small Onion illustration

Growing Korean Small Onion in Zone 10b

Zone 10b has a year-round growing season. Korean Small Onion can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.

Planting Calendar

Outdoor
Harvest
Dec 31Dec 22

Season: Jan 28 – Dec 22 (328 days)

Zone10b
Last FrostJan 28
First FrostDec 22
Season Length328 days
Days to Harvest65
SunFull Sun
Frost ToleranceHeavy
Spacing16/sqft (3" apart)

When to Plant Korean Small Onion in Zone 10b

Harvest: Feb 9

First harvest approximately Feb 9 (~40 days from transplant). Continue harvesting until first frost (Dec 22). Korean Small Onion can overwinter in mild climates for continued harvest.

Fall Planting: Nov 10

For a fall harvest, plant Korean Small Onion around Nov 10 (6 weeks before first frost).

Companion Planting

❌ Bean❌ Pea

Frequently Asked Questions

When should I plant Korean Small Onion in Zone 10b?

Direct sow Korean Small Onion outdoors around Jan 28. Harvest around Feb 9.

What is the last frost date for Zone 10b?

The average last spring frost date for Zone 10b is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Korean Small Onion in Zone 10b?

Yes. Korean Small Onion needs 65 days to harvest. Zone 10b has a 328-day growing season, which is sufficient.

What is the best month to plant Korean Small Onion in Zone 10b?

The best time to plant Korean Small Onion in Zone 10b is around Jan 28, when soil temperatures are suitable and frost risk has passed.

What companion plants grow well with Korean Small Onion?

Good companion plants for Korean Small Onion include Carrot, Beet, Lettuce. Avoid planting Korean Small Onion near Bean, Pea.

How long does Korean Small Onion take to harvest?

Korean Small Onion takes approximately 65 days from planting to harvest. In Zone 10b, expect your first harvest around Feb 9.

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