Menu
Alnus rubra (red alder) is a deciduous broadleaf tree in the Betulaceae (Birch) family native to western North America. Red Alder is the largest species of alder in North America and one of the largest in the world, reaching heights of 20-30 meters. The official tallest red alder (1979) stands 32 meters tall in Clatsop County, Oregon (USA). The name derives from the bright rusty red color that develops in bruised or scraped bark. The bark is mottled, ashy-gray and smooth, often draped with moss. Large trees are often unbranched for a considerable distance from the ground. Description from Calscape
Home > Plant Guide >
Scientific Name
Family
Garden Type
Wildlife
Native Plant Region
Light needs
Water Needs
Plant Type
Bloom Color(s)
Height
Width
Months in Bloom
Safe Beneath Power Lines?
We’d like to maintain accurate and robust plant listings. If you see information that is not correct or that could be added to improve the listing, please let us know. Or if you’d like to suggest a plant to add to our plant guide, you can use this form do so. Thank you!
Get involved by sharing and mapping the birds, animals and nature around you to help the community understand the biodiversity in our neighborhood.
Protecting the trees and other vegetation that what we currently have is perhaps the most important way to ensure biodiversity in cities.
Learn about container gardening with shrubs, trees, herbs, veggies, perennials, and annuals. A special focus will be on plantings that provide pollinators with food and that encourage bird habitat.
Some introduced plant species can diminish biodiversity. Other plants produce poisons that can harm wildlife. Learn what plants to avoid when figuring out what to plant or remove in your outdoor space.
This workshop will guide you through the process and materials needed to help you decide if Mason Bees are right for you and your garden, whether you have a small deck or an open garden.
Take a virtual tour of Capitol hill with naturalist and author David B. Williams and gain a new appreciation of the nature of the city and its wild side.
Nature of Your Neighborhood is a collaboration between Birds Connect Seattle, the Capitol Hill EcoDistrict, and the Seattle Bird Conservation Partnership. Our goal is to foster relationships between the people and the nature of their neighborhoods.
