Alnus rubra 7gal Red Alder
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- Red Alder.
- Wavy, toothed, green leaves with revolute margins.
- Long catkins in spring.
- Small, brown, cone-like strobiles persist through winter.
- Likes wet soil.
- Red Alder hosts a kind of bacteria called Frankia in nodules on its roots. Frankia has a symbiotic relationship with Alder: the tree receives nitrogen in the form of ammonia converted from atmospheric nitrogen by the bacteria, and the bacteria receives carbon and energy sources from the tree in return.
- Pacific NW Native.
- Deciduous tree.
- Zones 5-8.
- Full sun.
- 50-100 ft. tall and 45 ft. wide.
