Red alder is a fast-growing deciduous tree well suited for disturbed and infertile soils, and an excellent nitrogen fixing plant. Generally grows to a height of 40-50 feet, sometimes reaching up to 80 feet. Red Alder flowers in March with hanging, cylindrical reddish-orange catkins. Leaves turn a slight golden color in the autumn.
In the open, red alders grow into a broadly conical shape with spreading branches. It is an excellent wildlife tree that provides cavity-nesting opportunities and forage for a wide range of songbirds. It also serves as a host plant for swallowtail butterfly larvae.
Best in sun to part shade with moist soils.
- Light Requirements: Full Sun, Part Shade
- Water Requirements: Moist
- Ease of Growing: Easy to grow
- Growth Rate: Moderate
- Spreads: No
- Wildlife Support: Pollinators, Pest-eating Insects, Birds or Mammals
- Edible: No
- Mature Height: 40-50ft
- Mature Width: 40-50ft