Common Alder
- Botanical Name
- Alnus glutinosa
- Hardiness
- Zones 4 to 7
- Height
- 40 to 60 feet
- Width
- 20 to 40 feet
- Flowers
- Male catkins, female purplish egg shaped strobile
- Fruit
- Winged nutlet borne on egg-shaped woody strobile, persistent
- Light
- Full sun to part shade
- Soil
- Moist to wet
- Planting & Care
- Transplants easily in spring
- Good tree for reclamation sites
- Fixes own nitrogen
- Problems
- Wooly alder aphid, tent caterpillar, can become invasive
- Varieties
- Laciniata - dissected leaves
- Pyramidalis - upright, narrow spread, good disease resistance
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