Dahlia imperialis (Tree Dahlia)


Botanical Information

FamilyAsteraceae
GenusDahlia
Speciesimperialis
CategoryBulbs, Perennials, Tropicals
OriginMexico and Guatemala.

Details

USDA Hardiness Zone7-10
USDA Hardiness Ref.
Canadian Hardiness ZoneRequires cool season protection under glass.
Canada Hardiness Ref.
RHS Hardiness ZoneH2- H6
RHS Hardiness Ref.
Temperature (°C)-17.8 - 4.4
Temperature (°F)0-40
Height2-4 m
GrowthFast
Flowering PeriodSeptember, October, November

Description and Growing Information

PropagationPropagated from tubers or cuttings. Tubers planted 10 cm apart, in full sun with space to grow. Best planted in mid-spring when the last frost has passed.
CultivationGrows well in full sun and rich soils.
Notable SpecimensBok Tower Gardens, Lake Wales, Florida, United States of America.
HabitatMust be grown in sunny, humid and consistently warm areas for the plant to bloom.
Flower DescriptionFlower colour varies from pale pink to white and purple. The double flowers are typically 10-15 cm across.

Photographs