1. Home

Invasive Species

phs Greenleaf provides swift, professional services to tackle the problems caused by non-native and highly invasive plants in your grounds or gardens. Including japanese knotweed removal and multiple other related services, there are several species of invasive plants that can take a firm grip of your landscape, affecting not just its visual appeal but also the proper growth of the plants that you want to thrive. These fast-growing weeds can also destabilise soil and structures in your garden and business grounds. There are varieties of non-indigenous and invasive plants that are harmful to humans too, making it even more vital to deal with them promptly. Did you know that some varieties of plants can decrease the likelihood of getting a mortgage for your property, making it harder for you to sell your home or business premises? Further frustration can come from the fact that these insidious and fast-spreading ‘uninvited guests’ can be hard to get rid of, once and for all.

Download Our Brochure

How can phs Greenleaf use its plant insights and specialist skills when you’re seeking solutions to invasive weeds?

phs Greenleaf offers a comprehensive service to tackle the intrusion and rapid growth of plants that are unpleasant or hazardous. We remove them safely and decisively, for a clear and accountable fee. This includes the assessment, treatment and removal of Giant Hogweed, Japanese knotweed and Himalayan Balsam.

The law on tackling invasive weeds: Dealing with these plants yourself – or ignoring their spread - carries serious risks, including non-compliance with relevant legal requirements. There is currently no statutory right covering the removal of Himalayan Balsam, Giant Hogweed and Japanese knotweed. However, it is an offence to deliberately spread these dominant weeds in the wild under The Wildlife and Countryside Act (1981). Also, both Giant Hogweed and Japanese Knotweed are a Controlled Waste substance and must be disposed of in a licensed landfill site.

Steps to remove invasive weeds: How can phs Greenleaf use its plant insights and specialist skills when you’re seeking solutions to invasive weeds?

• Our trained professionals conduct site visits to provide thorough assessments.

• A detailed report will be provided, identifying the species and coverage area.

• Using our industry knowledge we can select the most appropriate chemical and non-chemical methods.

• All risk assessments and safety criteria are covered by us.

• Invasive weeds are removed and a disposal plan agreed.

• Appropriate chemicals can be applied if relevant.

• All appropriate waste transfer paperwork can be provided.

Types of invasive, non-indigenous plants removed by phs Greenleaf

The team at phs Greenleaf would be happy to discuss improving the contents of your landscape with plants that are beneficial, aesthetically pleasing and low maintenance.

We can also remove the following unwelcome visitors to your grounds:

Himalayan Balsam (Impatiens glandulifera)

First introduced to the UK in 1839, the Himalayan Balsam can tolerate low light and thrives in moist, semi-shaded areas such as around rivers and other watercourses, and within waste sites. It is a weed that can grow by 2-3m in height annually, and one of its identifying features is purplish-pink flowers that appear between June and October. Himalayan Balsam is particularly insidious in the way it makes areas uninhabitable for competing vegetation, causing the desired plants to die off. The ease with which it multiplies comes from the way its seed pods explode open when ripe. Each plant has the potential to disperse up to 800 seeds, shooting out up to 7m (22ft) in all directions.

Giant Hogweed (Heracleum mantegazzianum)

Originally from Southern Russia and Georgia, this species of Giant Hogweed has become a fast-spreading problem in the UK and can grow over 3m high. A fully matured plant can appear impressive, but it is health risk if it is ignored. Skin contact with Giant Hogweed releases chemicals in the sap which can then impact on photo-dermatitis, creating greater sensitivity to sunlight, and potentially leading to skin blisters, issues with pigmentation and ultimately scarring.

Japanese Knotweed (Fallopia japonica)

Such is the relentless growth of Japanese knotweed, it can not only strangle neighbouring plants but also grow through tarmac and cause structural damage to walls, patios and buildings such as conservatories. It thrives in moist areas and around wasteland, usually in well-lit spaces though it can tolerate some shade. This species of invasive weed can typically grow to a height of 2m.

For a professional assessment of non-native, fast-spreading weeds – and safe removal of invasive plants – contact us for a free quote or to book a site visit.

(additional source of information: http://www.nonnativespecies.org/factsheet/factsheet.cfm?speciesId=1495)

Our removal service

Our trained technicians will assess the area and provide a bespoke report

Treatment and removal off site available

Trained and experienced staff certified to inject the stem with approved herbicides on commercial premises will treat the Japanese knotweed

Cuttings may also be left on site on request


Emma was lovely, very helpful and dealt with my query in a professional and efficient manner, even apologising for not being available on my initial call, as I had to leave a voicemail, but she got back to me within minutes. Very impressed.

Brighton marina brand logo

Our artificial flowers look great around our head offices. The oriental spring range is definitely my favourite and I look forward to receiving our next range.

David Lloyd brand logo

Our plants are a great addition to our pubs and brighten them up whilst keeping with our pub theme. We are extremely impressed with the quality of the products and the service. Thank you for making it an easy stress free process.

Fullers client brand logo
Category Icon Calendar