DibbleWhen to plant green onions in Zone 10
In Zone 10, the last spring frost usually passes around January 31 and the first fall frost arrives around December 15, leaving about 318 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Nearly frost-free. Grow cool crops in winter; summers are too hot for many vegetables.
Planting windows for green onions in Zone 10
| Task | Window |
|---|---|
| Direct sow | Jan 3 to Jan 17 |
| Estimated harvest | Mar 4 to Apr 3 |
The harvest estimate counts 60 days to maturity, then a picking window of about 30 days. These windows use typical frost dates for Zone 10; Dibble pins them to your exact ZIP code.
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Green Onion in a Zone 10 season
Zone 10 gives about 318 frost-free days. Green Onion needs roughly 60 days from sowing. That leaves about 258 days of slack, so there is room for a late start or a second planting.
Sowing every 14 days, Zone 10 has room for about 19 plantings.
How to grow green onions
Sow scallions thickly 4 weeks before last frost and harvest young. Quick and hardy, succession sow for a steady supply.
Companion plants
Good neighbors for Green Onion:
Better kept apart:
Green Onion in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Green Onion: the full growing guide · The Zone 10 planting calendar · Every crop and zone
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Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.