Invasive Plant Species Survey & Eradication

We offer effective expert management processes to combat the ever increasing rise in invasive plant species established in domestic gardens, commercial landscapes, development sites, waterways, embankments and areas of natural beauty. The full list of INVASIVE  PLANT SPECIES is included in Schedule 9 Part II of the Wildlife and Countryside Act 1981.

Nothing is often more irritating for gardeners than their pride and joy blighted by an invasive weed. Below is a selection of plants which DEFRA classifies as the most invasive.

Giant hogweed
Japanese knotweed
Himalayan balsam
New Zealand pigmyweed
Rhododendron ponticum
Giant hogweed

Giant Hogweed

Giant Hogweed

Rather similar in looks to an overgrown cow parsley, it can grow to 10 feet high and can also be harmful to the skin if its sap makes contact.

Similar to other invasive plants being difficult to control, it needs a considerable amount of attention to prevent its spread. Attention must be paid in terms of selecting the appropriate Personal Protective Equipment when dealing with this plant such as adequately covering arms and legs, and wearing a mask. The sap and debris can cause a nasty reaction.

Japanese knotweed

Japanese knotweed

 

Japanese Knotweed

The problem with Japanese knotweed, is that despite the fact it dies back throughout the winter, its root system is both extensive and strong. Being seedless, the roots are the only way in which the plant can spread.

Its vigorous growth and hostile command of land has resulted in it being an offence against the 1981 Wildlife and Countryside Act to grow it. In the UK, if it isn’t controlled by those who have it in their garden, a community protection notice can even be given.

Effective treatment of Japanese Knotweed can take several years to be effective. In terms of control, Japanese knotweed is obviously extremely difficult. The root system can travel very far and the smallest rhizome can produce an entirely new plant. It is therefore essential that expert assistance is used in its eradication.

Himalayan balsam

Himalayan balsam

Himalayan Balsam

Despite a display of rather pretty pink flowers, Himalayan balsam can be extremely difficult to get rid of if it takes hold in your garden.

Producing 800 seeds every year, which can survive for up to two years whilst floating in rivers or streams, and extremely tolerant of shady positions, Himalayan balsam is extremely invasive having an ability to smother other flora.

New Zealand pigmyweed

New Zealand pigmyweed

New Zealand pigmyweed

New Zealand pigmyweed, as opposed to the other invasive species detailed here, grows primarily in water, or soil with a heavy water content near to the sides of lakes/streams etc.

Not only does it provide hefty competition to other native plants, but also due to the dense matting it creates on the surfaces of ponds etc, it can also reduce the oxygen available to fish and frogs. Like Japanese knotweed, it is an offence to plant it – as well as an offence to buy/sell it.

Rhododendron ponticum

Rhododendron ponticum

Rhododendron ponticum

Although Rhododendron ponticum produces the most attractive flowers, it does have an extremely negative impact on both wildlife and the ecology of the site which it inhabits.

The Forestry Commission has found that it can significantly reduce the numbers of earthworms, birds and plants in the area and it is also considered to be toxic to herbivores.

Other habitats of small mammals, such as the dormouse, have also been badly affected due to the smothering effect of the rhododendron on native plants.