This highly invasive weed can grows up to 3 metres in 3 months. • Himalayan knotweed - Leaves are broadly lance-shaped with a long pointed tip. Other Common Names: None. This particular member of the Polygonaceae family is often mistaken for Japanese Knotweed, which is why experience, expert analysis and identification is necessary in order to carry out the proper and most effective treatments and control measures. Himalayan Balsam should be cut below the lowest node otherwise is will just re-grow again. Himalayan Knotweed. Under this Act, âan occupier1 must control noxious weeds growing or located on land and premises, and on any other property located on Himalayan Balsam control can involve the use of chemicals although there are some non-chemical control measures that can also be used. It has a hollow stem, similar to ⦠Smaller infestation of Himalayan Balsam can be controlled by hand-pulling. If you are undertaking Japanese knotweed, Giant hogweed or Himalayan balsam control with your application, you must submit a 1:10 000 OS map identifying the current distribution of plant species that you propose to treat before control work starts. Thank you...one of our team members will be in touch. As another persistent non-native species, regulatory bodies advise that it is managed in the same way as Japanese Knotweed. Each year after that you must map the affected area following control work, each year. They are very fast growers and can reach full height by the end of June. We will survey a site and establish the best method and price for control or eradication in accordance with your requirements. Eradicate Himalayan Balsam (Impatiens Glandulifera) from your land. Established in 2014 and based in Coleraine, the Knotweed Management Company provides proven solutions to remove and treat the triple threat of Japanese Knotweed, Himalayan Balsam, and Giant Hogweed. Himalayan balsam: controlling it on your land; Giant hogweed: controlling it on your land; First published 14 December 2015 Last updated 7 August 2020. If you've ever wandered along a riverbank, pond or lake, we guarantee you will have seen it at least once! For maximum effectiveness, the measures detailed further down this page should be carried out before June, which is the start of the flowering stage and before the seed pods are visible. Flowers of all species are white, about 3 mm across, each bearing 3 to 5 petals and borne in racemes from 2 to 4 inches long that arise in the upper leaf axils. … Other invasive weeds. We are The Invasive Plant Company, industry experts in the delivery of successful, cost-effective solutions for the control and eradication of Japanese Knotweed and other invasive plant species. It grows in both sunlight and partial shade. To education the public about the law requiring landowners to control and to prevent the spread of noxious weeds from their property. For a copy of the guidance to control Japanese knotweed in construction and landscape contracts contact plant.health@gov.wales. Conservation authorities sometimes partake in âBalsam bashingâ parties, but these must be undertaken with extreme caution, as studies have shown that this can actually help the plant to spread. It can grow quickly and costs will grow as the plant does. In Japanese knotweed, male and female flowers are on Himalayan Balsam is naturally found in Asia in the mountains of the Himalayas and bought back to the UK by the Victorians. • Giant knotweed - Leaves are deeply curved and heart shaped base (cordate). Smaller infestation of Himalayan Balsam can be controlled by hand-pulling. MANAGEMENT OPTIONS: Management options are not well known for Himalayan knotweed. Himalayan Knotweed can be identified by its elongated leaves. Invasive weed control on Council owned land. Can form dense stands that outcompete native species. Himalayan knotweed is native to south and central Asia, including the Himalayas. The long, tapering leaves are 4 to 8 inches long, with brown, persistent sheaths at the bases of the leaf stalks. Legal Status: None. Invasive Species Guide: Himalayan Balsam 1 | P a g e Invasive Species Guide: Japanese Knotweed Photos are sourced from GBNNSS, Trevor Renals and CABI. An effective Himalayan Balsam control measure for larger strands of the plant is to repeatedly cut or mow the plant. Company registration number: SC1681538 Muriel Street, Barrhead, Glasgow G78 1QB. Himalayan Knotweed (Persicaria Wallichii) is a robust rhizomatous perennial that can grow to 1.8 metres and produces loosely clustered pinkish or white flowers in late summer into early autumn.Again, like the other Knotweeds this was introduced as an ornamental and has become very persistent in abandoned gardens and on roadsides or where there is garden waste. Himalayan knotweed (P. polystachyum) is also present in some locations. Himalayan balsam: controlling it on your land; Giant hogweed: controlling it on your land; First published 14 December 2015 Last updated 7 August 2020. If the Himalayan Balsam is near a water-course the use of chemical control may be impossible. The good news is that Himalayan knotweed is just as treatable as Japanese knotweed and the same techniques can be used. Download the Himalayan Balsam information sheet - PDF. Japanese, Sakhalin, Bohemian, and Himalayan knotweeds . It has not been designated for required control in the county by the Washington State Noxious Weed Control Board, but it has been selected for required control in limited parts of the county by the King County Noxious Weed Control Board. Invasive Plant Solutions. Whether you are a land manager dealing with a large Himalayan Balsam infestation or a property owner with a couple plants in the garden it is crucial not to allow the seeds to spread. Water-Course the use of chemicals although there are some Non-Chemical control measures that can also used. Are traditionally two methods of dealing with Himalayan Balsam can spread through its exploding seed.! Clumps which can be up to 3 metres in 3 months landscape contracts contact @. Dense … eradicate Himalayan Balsam control measure for larger strands of the leaf have distinct hairs. Margins or veins on the local environment and the timescale required removing weed... 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