Reynoutria japonica common name Japanese knotweed has successfully established itself in numerous habitats and is classified as a pest in several countries across the globe. It was originally brought to the UK as a decorative plant given its pretty white flowers that bloom in the spring and summer. However, this plant is extremely invasive and costs the UK economy approximately 166m per year.

Japanese knotweed has hollow stems with distinct raised nodes that give it the appearance of bamboo, though not related. While stems may reach a maximum height of 3–4 m (10–13 ft) each growing season, it is typical to see much smaller plants in places where they sprout through cracks in the pavement or are repeatedly cut down. 

Integritas offer 5 to 10 year Japanese knotweed plans, this is dependent on various factors, such as location, size, and time, therefore tailoring the plans to suit our customers requirements.

A highly invasive plant, extremely damaging to both the health of animals and humans. Giant Hogweed is commonly found near the banks of rivers near a source of water, where it is left to grow out of control, often leading to the overshadowing of other plants and killing them off in the process. Giant hogweed typically grows to heights of 2m to 5m and under ideal conditions, a plant can reach a height of 5.5 m. The sap of giant hogweed is phototoxic and causes phytophotodermatitis in humans, often resulting in blisters and scars.

Equisetum arvense , more commonly referred to as, Horsetail, is a deep rooted and does most of its growing underground, with its tap root reaching up to 7ft in length. It is a perennial plant, which means that everything above ground dies back in the winter and returns with vim, vigour and vitality in the spring.

Crassula helmsii, known as swamp stonecrop or New Zealand pigmyweed, is an aquatic or semiterrestrial species of succulent plant in the family Crassulaceae. Originally found in Australia and New Zealand, it has been found globally. In the United Kingdom, this plant is one of five introduced invasive aquatic plants that were banned from sale from April 2014, the first ban of its kind in the country. The shoots are stiff, carrying narrow parallel-sided leaves in opposite pairs, each leaf being about 4–24 millimetres. Small white flowers with four petals are produced in summer on long stalks arising from the upper leaf axils.

Also known as ‘Indian balsam’, Himalayan balsam is originally from the Himalayas. This has earned it the charming nickname of ‘Kiss-me-on-the-mountain’ in some parts of the UK. The invasive Himalayan Balsam can grow up to 3 meters tall and has long, green leaves that are oval in shape plus it has green seed pods. The plant produces many pink, hooded flowers that bloom from June to September. The Himalayan balsam flowers are followed by long, slender seed pods that explode when ripe, releasing hundreds of seeds up to 7 meters away. The Himalayan Balsam is easily the most invasive weed in the UK, aggressively taking over waste ground, river banks, damp woodlands, and any other surfaces it can thrive on.