Description Native to Asia, the Himalayan blackberry is an evergreen shrub with canes covered in thorns and berries that are edible for humans. It can grow in a variety of environments and often is found along roadsides, riverbanks, parks, and other disturbed areas. Himalayan blackberry shades out smaller, native species, reducing native plant and wildlife diversity. Its extensive stands can decrease usable pasture, limit animals’ access to water, and trap young livestock. Blackberry fruit can be a food source to invasive birds and mammals such as European starlings and rats. The Himalayan Blackberry was accidently released from an experimental nursery in 1885, where it quickly spread from California to Alaska. In Washington State, the Himalayan Blackberry is considered an aggressive invasive species and is a nuisance to many Washington State homeowners. It can rapidly spread through vegetative reproduction by rooting stems and fragments, produce large quantities of seeds dispersed by...