Woody > Alnus > Alnus incana > Alnus incana
Alnus incana
Grey Alder
Origin: Canada and the northeastern United States of America.
| Family |
| Betulaceae |
| Genus |
| Alnus |
| Species |
| incana |
| Category |
| Woody |
| Type |
| Tree (deciduous) |
| USDA Hardiness Zone |
| 2 - 6 |
| Canadian Hardiness Zone |
| 0a - 5b |
| RHS Hardiness Zone |
| H7 |
| Temperature (°C) |
| -46 - (-21) |
| Temperature (°F) |
| -50 - (-5) |
| Height |
| 5 - 8 m |
| Spread |
| 5 - 8 m |
Photographs
Cultivars
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Description and Growing Information
Flowering Period
| General Description |
| This species is considered globally threatened and has been place on the IUCN Red List. |
| Cultivation |
| Tolerant of infertile and drier soils. |
| Growth |
| Medium |
| Bark/Stem Description |
| Smooth, pale grey park with grey-downy shoots. |
| Leaf Description |
| Leaves 4-10 cm, broadly ovate or oval, a dull rugose green above, and white-grey downy beneath, |
| Flower Description |
| Male catkins grow to 5-10 cm in clusters of 3-4. |
| Fruit Description |
| Fruit to 1.5 cm, ovoid, appearing in bunches of 4-12, sessile or shortly stalked. |
| Notable Specimens |
| Spooky Hollow, Port Dover, Ontario, Canada. Westonbirt, The National Arboretum, Tetbury, Gloucestershire, England. |
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