Rubus caesius aka European Dewberry

Rubus caesius, also known as the European dewberry, is a deciduous shrub that belongs to the rose family and is closely related to the blackberry. This Eurasian plant is widely distributed throughout Europe and Asia, ranging from Ireland and Portugal to Xinjiang Province in western China. It has also become naturalized in scattered locations in Argentina, Canada, and the United States. The plant grows up to 2 meters tall with biennial stems that die after fruiting in their second year. It sends out long runners that root at the tip to form new plants. The stems are bluish-grey and sometimes prickly, while the alternate leaves are hairy above and below. The plant is hermaphrodite and is pollinated by bees, flies, beetles, and apomictic. The inflorescence is a loose cluster of several white flowers that bloom from June to September. The plant prefers moist, well-drained soil and can grow in semi-shade or no shade. It can tolerate different soil pH levels, including alkaline soil. The dewberry is a useful plant and is sometimes confused with forms of Rubus fruticosus. As a houseplant, dewberry needs regular watering and long-lasting, direct light, and should be less than 1 foot from a window. It also prefers well-draining soil and doesn't need added fertilizers if repotted each time it doubles in size.