Aeonium arboreum subsp. holochrysum (Tree Aeonium, Tree Houseleek, or Irish Rose)
Botanical Information
| Family | Crassulaceae |
| Genus | Aeonium |
| Species | arboreum |
| Subspecies | holochrysum |
| Synonyms | Aeonium holochrysum |
| Category | Perennials, Tropicals |
| Type | Shrub (evergreen) |
| Origin | Native to the Canary Islands. |
Details
| USDA Hardiness Zone | 11a - 11b |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 9b |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H1c |
| RHS Hardiness Ref. | |
| Temperature (°C) | 5 to 10 |
| Temperature (°F) | 50 to 60 |
| Height | 0.5 - 1 m |
| Spread | 0.5 - 1 m |
Description and Growing Information
| General Description | Large, flat, green leaves, all tipped with red. Each shoot ends in a rosette. These succulents can grow to large sizes. |
| Shape | Upright columnar, to bushy. |
| Landscape | Novelty, single specimen, or in partially shaded rock gardens. |
| Propagation | Sow seed in spring. Cuttings of rosettes must be kept at room temperature and barely moist until rooted. |
| Cultivation | Light, well-drained soil in full sun exposure. Summer dormancy requires little water, while the growth period requires plenty. |
| Pests | May be attacked by aphids and mealybugs. |
| Notable Specimens | Chelsea Physic Garden, London, United Kingdom. |
| Habitat | Dry coasts and coastal valleys. |
Photographs
Aeonium arboreum var.holochrysum, form. Chelsea Physic Garden. London, United Kingdom.
Aeonium arboreum var.holochrysum, leaf. Chelsea Physic Garden. London, United Kingdom.
Aeonium arboreum var.holochrysum, seedling. Chelsea Physic Garden. London, United Kingdom.