Himalayan blackberry spreads over other plants or buildings and can form dense, thorny thickets. , When established for several years, if left alone, Rubus armeniacus can grow into a large cluster of canes. Flowers are not produced on first year shoots. Become a certified small business contractor or supplier, Find certified small business contractors and suppliers, King County's Best Management Practices for Blackberry, Himalayan Blackberry - King County Noxious Weed Alert, OSU's Invasive Weeds in Forest Land: Himalayan and Evergreen Blackberry, Managing Himalayan Blackberry in western Oregon riparian areas, Controlling Himalayan Blackberry in the Pacific Northwest, Washington State Noxious Weed Control Board, The Pacific Northwest Weed Management Handbook, Stout, arching canes with large stiff thorns, Up to 15 feet tall; canes to 40 feet long, Small, white to pinkish flowers with five petals, Leaves are palmately compound with large, rounded to oblong, toothed leaflets usually in groups of 5 on main stems, Blackberry canes root at the tips, creating daughter plants, Main plants have large, deep, woody root balls that sprout at nodes, Can be distinguished from the native trailing blackberry (, Blackberry reproduces by seed and vegetatively by rooting at stem tips and sprouting from root buds, Plants begin flowering in spring with fruit ripening in midsummer to early August, Somewhat evergreen in this area, although will die back with colder temperatures, Daughter plants form where canes touch ground, Seeds remain viable in the soil for several years, Fruiting stems generally die back at the end of the season, but non-fruiting stems can persist for several years before producing fruit. The stem is stout, up to 2–3 cm diameter at the base, and green; it is polygonal (usually hexagonal) in cross-section, with fearsome thorns up to 1.5cm long forming along the ribs. Native blackberries also grow in this region, but they are a much rarer sight. Himalayan blackberry is a perennial bramblewith stems that grow up to 9 meters long. It is common in the Pacific The cultivars "Himalayan Giant" and "Theodore Reimers" are particularly commonly planted. The name blackberry is used to describe several species, including Rubus fruticosis (wild blackberry), Rubus ursinus and Rubus argutus, two species native to North America. The species is pollinated by insects, or more commonly, propagated with rooting canes (branches). See King County's northwest native plant guide for suggestions. Himalayan blackberry out-competes native understory vegetation and prevents the establishment of native trees that require sun for germination such as Pacific Madrone, Douglas Fir and Western White Pine. The most labor friendly and cost-effective way to remove this plant in smaller-scale infestations is to cut it as close to the ground as possible and then apply a drop or two of a triclopyr-based herbicide to the cut. Description. Latin Names: Rubus armeniacus Rubus discolor Rubus procerus. The blackberry is an edible fruit produced by many species in the genus Rubus in the family Rosaceae, hybrids among these species within the subgenus Rubus, and hybrids between the subgenera Rubus and Idaeobatus.The taxonomy of the blackberries has historically been confused because of hybridization and apomixis, so that species have often been grouped together and called species aggregates. Both first and second year shoots are spiny, with short, stout, curved, sharp spines. Himalayan blackberry is a Eurasian species introduced for fruit production that is highly invasive and difficult to control. The stems, referred to as canes, can reach six to just over twelve meters (20-40 feet) and are capable of … In its second year, the stem does not grow longer, but produces several side shoots, which bear smaller leaves with three leaflets (rarely a single leaflet). The leaflets occur in groups of three or five and each resembles a … Description. R. armeniacus is a perennial woody shrub in which individual canes can reach 6-12 m horizontally and 3 m vertically. Abstract. Control is recommended but not required because it is widespread in King County. The effects of goat browsing on Himalayan blackberry vigor, as quantified by densities of different age class stems, are compared to mowing and … Himalayan blackberry is abundant along rivers and wetland edges in King County, often blocking acces… The other, evergreen blackberry (Rubus laciniatus) looks like Himalayan blackberry from far away, but up close you can ID it by its leaves: While Himalayan blackberry has large, toothed, rounded or oblong leaves that grow most often in groups of five, … Flowering canes whose smaller leaves have 3 leaflets sprawling, vine-like evergreen shrub native to Europe... Weed control program Directory, send an email, or burning thickets of Rubus armeniacus is perennial... Ineffective with this plant can easily establish itself and continue to spread in ecosystems that not. Methods or see below for more resources to contact staff, see the noxious weed control program Directory, an! 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