Growing Korean Small Onion in Zone 3b
Zone 3b has harsh winters and a short growing season. Start Korean Small Onion early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.
Planting Calendar
Season: May 15 – Sep 22 (130 days)
When to Plant Korean Small Onion in Zone 3b
Harvest: May 27
First harvest approximately May 27 (~40 days from transplant). Continue harvesting until first frost (Sep 22). Korean Small Onion can overwinter in mild climates for continued harvest.
Fall Planting: Aug 11
For a fall harvest, plant Korean Small Onion around Aug 11 (6 weeks before first frost).
Companion Planting
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 13bFrequently Asked Questions
When should I plant Korean Small Onion in Zone 3b?
Direct sow Korean Small Onion outdoors around May 15. Harvest around May 27.
What is the last frost date for Zone 3b?
The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.
Can I grow Korean Small Onion in Zone 3b?
Yes. Korean Small Onion needs 65 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.
What is the best month to plant Korean Small Onion in Zone 3b?
The best time to plant Korean Small Onion in Zone 3b is around May 15, 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 3b, expect your first harvest around May 27.
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