Growing Korean Small Onion in Zone 3a
Zone 3a has harsh winters and a short growing season. Start Korean Small Onion early indoors to maximize your harvest window. Last frost: May 22. First frost: Sep 12.
Planting Calendar
Apr 24Sep 12
Season: May 22 – Sep 12 (113 days)
Zone3a
Last FrostMay 22
First FrostSep 12
Season Length113 days
Days to Harvest65
SunFull Sun
Frost ToleranceHeavy
Spacing16/sqft (3" apart)
When to Plant Korean Small Onion in Zone 3a
Harvest: Jun 3
First harvest approximately Jun 3 (~40 days from transplant). Continue harvesting until first frost (Sep 12). Korean Small Onion can overwinter in mild climates for continued harvest.
Fall Planting: Aug 1
For a fall harvest, plant Korean Small Onion around Aug 1 (6 weeks before first frost).
Companion Planting
❌ 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 13bPlan Your Korean Small Onion Garden
Track Korean Small Onion from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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