Growing Korean Small Onion in Zone 1a
Zone 1a has harsh winters and a short growing season. Start Korean Small Onion early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.
Planting Calendar
Apr 27Aug 28
Season: May 25 – Aug 28 (95 days)
Zone1a
Last FrostMay 25
First FrostAug 28
Season Length95 days
Days to Harvest65
SunFull Sun
Frost ToleranceHeavy
Spacing16/sqft (3" apart)
When to Plant Korean Small Onion in Zone 1a
Harvest: Jun 6
First harvest approximately Jun 6 (~40 days from transplant). Continue harvesting until first frost (Aug 28). Korean Small Onion can overwinter in mild climates for continued harvest.
Fall Planting: Jul 17
For a fall harvest, plant Korean Small Onion around Jul 17 (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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