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Dahlia imperialis 'Alba'


Dahlia imperialis 'Alba' is the white form of the giant "tree dahlia" that reaches 10-20 feet tall with single white flowers.

Dahlia imperialis, the giant tree dahlia, is native to Mexico and Guatemala where it can grow up to 30 feet tall! In cultivation it more commonly reaches 10-20 feet. It is a very late bloomer with 3-4 inch wide, single, white flowers in the 'Alba' form (lavender in the species). This imposing oddity is hardy in coastal BC if grown in warm microclimates protected from winter rain. Or grow it in a large pot and place as a specimen in the garden. It likely will not flower if grown outdoors year round. If in a pot it can be brought into a greenhouse or sun room and will often flower in the winter or early spring. Photo: Wikipedia.

Common Name: Tree Dahlia - [Summer B&B Pre-Order]

Family: Asteraceae (The Aster/Daisy Family)

Zone Hardiness: 8-11

Light: Full Sun

Height: 2-4'

Width: 12-24"

Primary Bloom Colour: White/Cream

Secondary Bloom Colour: Yellow

Class: Deciduous

Type: Perennial

Bloom Time: Fall

Soil Moisture: Average, Dry

Stem Colour: Red

Fragrance: No


Benefits: Bees, Butterflies

Deer Resistant: Unknown

BC Native: No

Native Habitat: Native to Mexico, where they grow in sharply draining uplands and mountains characterized as "pine-oak woodland" that does not experience frost.


Geogrpahical Origin: Americas - North America

Americas - Central and South America

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