Himalayan Balsam is non-native invasive plant. A large annual plant in Britain, grows up to 2.5m high from seed in a season. Himalayan Balsam spreads quickly as it can spread its seeds up to four metres. Many seeds drop into water, contaminate land and riverbanks downstream. The explosive nature of its seed release means it can spread upstream too. Habitat It is commonly found along riverbanks and streams, as well as around ponds, lakes, ditches and damp meadows. It spreads quickly, forming dense thickets, altering the ecological balance and character of wetland habitats. It produces a lot of pollen over a prolonged period and is attractive to pollinating insects. The concern is that its presence may result in decreased pollination for other native plants. Himalayan Balsam needs dealing with before it sets seed. If control is undertaken early enough to prevent flowering, eradication is possible in two or three years. Read more...