DibbleWhen to plant radishes 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 radishes in Zone 10
| Task | Window |
|---|---|
| Direct sow | Jan 3 to Jan 17 |
| Estimated harvest | Jan 31 to Feb 10 |
The harvest estimate counts 28 days to maturity, then a picking window of about 10 days. These windows use typical frost dates for Zone 10; Dibble pins them to your exact ZIP code.
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Radish in a Zone 10 season
Zone 10 gives about 318 frost-free days. Radish needs roughly 28 days from sowing. That leaves about 290 days of slack, so there is room for a late start or a second planting.
Sowing every 10 days, Zone 10 has room for about 30 plantings.
How to grow radishes
The fastest crop, ready in about a month. Sow 4 weeks before last frost and every 10 days while it's cool.
Companion plants
Good neighbors for Radish:
Radish in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Radish: 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.