When to plant dahlias in Zone 11

In Zone 11, the last spring frost usually passes around January 1 and the first fall frost arrives around December 31, leaving about 365 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.

Frost-free, tropical. Year-round growing; timing follows wet/dry and heat, not frost.

Planting windows for dahlias in Zone 11

The harvest estimate counts 90 days to maturity, then a picking window of about 70 days. These windows use typical frost dates for Zone 11; Dibble pins them to your exact ZIP code.

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Dahlia in a Zone 11 season

Zone 11 gives about 365 frost-free days. Dahlia needs roughly 90 days from planting. That leaves about 275 days of slack, so there is room for a late start or a second planting.

How to grow dahlias

Plant tubers once the soil has warmed and nights stay mild. Where winters freeze hard, lift and store them before the ground freezes. In very hot climates give them afternoon shade, which keeps the blooms coming.

Companion plants

Good neighbors for Dahlia:

Dahlia in other zones

Not in Zone 11? Pick your zone for the same dated windows.

Keep exploring

Dahlia: the full growing guide · The Zone 11 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.