Spec sheet
- Hardiness
- Hardy to zone 5
Prices and ordering are for approved wholesale customers
Sign in to see your price and what is ready now in each size.
Already buying from us by phone? Call 503-982-6300 and we will send you an invitation.
Sizes we grow
Container grown (CG)
- #25
B&B in pot (BBP), by caliper or height
- 1.5 in caliper
- 3 in caliper
About this plant
Alnus rubra, commonly known as Red Alder, is a fast-growing deciduous tree native to the Pacific Northwest of North America. It is well-suited for riparian zones and disturbed areas, often improving soil through nitrogen fixation. Its smooth, grey bark is accented by patches of white lichen, and the leaves are ovate with finely serrated edges. Red Alder is valuable for erosion control and provides habitat and support for wildlife. In spring, it produces subtle catkins that bring seasonal interest. It is an excellent choice for ecological restoration projects.
- Light: Full sun to partial shade
- Water need: Moderate to high; prefers moist conditions
- Growth rate: Fast
- Mature size (HxW): 40–80 ft x 20–30 ft
- Habit: Upright, spreading
- Bloom/interest: Catkins in spring
- Hardiness zone: 5–8
- Soil tolerance: Prefers moist, well-drained soil; tolerates poor soil
- Drought/heat tolerance: Low; prefers consistent moisture