DibbleWhen to plant nasturtiums 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 nasturtiums in Zone 10
| Task | Window |
|---|---|
| Direct sow | Feb 7 to Feb 21 |
| Estimated harvest | Mar 29 to Jun 27 |
The harvest estimate counts 50 days to maturity, then a picking window of about 90 days. These windows use typical frost dates for Zone 10; Dibble pins them to your exact ZIP code.
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Nasturtium in a Zone 10 season
Zone 10 gives about 318 frost-free days. Nasturtium needs roughly 50 days from sowing. That leaves about 268 days of slack, so there is room for a late start or a second planting.
How to grow nasturtiums
Sow seeds after last frost in lean soil. The edible leaves and flowers lure aphids away from your vegetables.
Companion plants
Good neighbors for Nasturtium:
Nasturtium in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Nasturtium: 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.