Dahlia imperialis (Tree Dahlia)
Botanical Information
| Family | Asteraceae |
| Genus | Dahlia |
| Species | imperialis |
| Category | Bulbs, Perennials, Tropicals |
| Origin | Mexico and Guatemala. |
Details
| USDA Hardiness Zone | 7-10 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | Requires cool season protection under glass. |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H2- H6 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -17.8 - 4.4 |
| Temperature (°F) | 0-40 |
| Height | 2-4 m |
| Growth | Fast |
| Flowering Period | September, October, November |
Description and Growing Information
| Propagation | Propagated 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. |
| Cultivation | Grows well in full sun and rich soils. |
| Notable Specimens | Bok Tower Gardens, Lake Wales, Florida, United States of America. |
| Habitat | Must be grown in sunny, humid and consistently warm areas for the plant to bloom. |
| Flower Description | Flower colour varies from pale pink to white and purple. The double flowers are typically 10-15 cm across. |
Photographs
Dahlia imperialis, form. Bok Tower Gardens, Lake Wales, Florida, United States of America.
Dahlia imperialis, leaf. Bok Tower Gardens, Lake Wales, Florida, United States of America.