Bush Rockspiraea

Bush rockspiraea is a native western shrub with fine branching and airy cream-white flower clusters. Its mature shape and size vary widely with site conditions, making it useful in naturalistic plantings. ## Plant profile Holodiscus dumosus is a deciduous member of the rose family found in western North America. Oregon State describes it as a shrub ranging from about 1.5 to 20 feet tall and 5 to 10 feet wide, with flowering in summer. The broad size range reflects variation across habitats and growing conditions, so a local specimen can fall widely within it. ## Garden care The species can grow in partial shade and tolerates well-drained, relatively dry soils. Its open branching and light flower clusters suit native plantings, slopes, and informal shrub borders. USDA zone 3 is supported by the Oregon State profile. ## Maintenance Allow its natural outline to develop, and remove damaged or crossing branches when needed. Avoid regular shearing, which can obscure the loose branching character. [Oregon State Landscape Plants](https://landscapeplants.oregonstate.edu/plants/holodiscus-dumosus)