Shrub Spiraea Douglasii

It occurs most often in riparian habitat types such as swamps streambanks bogs and mudflats.

Shrub spiraea douglasii. Click below on a thumbnail map or name for subspecies profiles. Spiraea douglasii is native to western north america from alaska across southwestern canada and the pacific northwest. It was introduced to europe where it is considered invasive. Spiraea douglasii commonly called western spirea steeple bush or hardhack is a deciduous clump forming shrub that will spread by suckers to form colonies over time.

It typically grows 4 6 tall. Spiraea douglasii western spirea noted for its vigor spiraea douglasii western spirea is a clump forming suckering shrub with narrowly oblong leaves that are dark green above velvety white underneath and turn yellow in fall. Many stemmed fast growing rhizomatous deciduous shrub with shiny green leaves that are oval and toothed toward the tip and white woolly beneath. Spiraea douglasii grows 3 6 ft 1 2 m.

It spreads by rhizomes and is very aggressive it often forms dense colonies and can quickly become the dominant species in a wetland habitat.