Alnus glutinosa 'Imperialis'
European Alder, Black Alder, Common Alder
Family: Betulaceae Birch
| Type | Tree |
| USDA Hardiness range | 3A - 7A |
| Exposure | Partial shade to full sun |
| Bloom color | Purple, red |
| Bloom time | Spring |
| Water needs | Moist to wet |
| Landscape uses | Screen |
| Height | 25' to 50' / 7.60m to 15.20m |
| Spread | 25' to 35' / 7.60m to 10.60m |
| Growth rate | Moderate |
| Persistence | Deciduous, broadleaf |
| Leaf color | Green |
| Fruit color | Brown |
| Soil pH requirements | Acidic, neutral, alkaline, slightly alkaline |
| Soil type | Sandy, clay, loamy |
| Form | Oval, pyramidal |
| Attributes and features | Naturalizing |