Step by Step - How your Japanese Knotweed is assessed and managed

Japanese Knotweed Management in Ealing, Chiswick, Acton and Greater London


Step 1 - Site assessment:

  • Site Assessment; after Japanese knotweed identification has taken place, we complete a site assessment of your garden and surrounding area.
  • We assess the Japanese knotweed status and spread.
  • Identification of site features that could have an impact on various control options.
  • Discuss any future landscaping / development plans. Inquire if there have been known knotweed treatments in the past? Is there ongoing garden maintenance?
  • Carry out risk assessment and method statement before work commences.
  • A distribution map of Japanese knotweed will be produced and used to coordinate management and to monitor spread
  • We will enquire if there is a known history of Japanese knotweed growth on-site or on adjoining grounds and if previous treatment has taken place.

Step 2 - Management plan:

Based on the findings of our site assessment our surveyor produces a management plan specifically tailored to your site.

The management plan will set out:

  • The objectives and Japanese knotweed control options.
  • A time frame with a schedule of treatments.
  • A fully itemised breakdown of costs to manage your Japanese knotweed.
  • An assessment of the risks associated with any control action.
  • Advice on how to prevent spread around and off site.
  • Insurance backed guarantee option.

A Japanese knotweed management plan is a five-year plan that complies with the PCA guidelines. Control of Japanese knotweed takes an average three years of herbicide treatments followed by two years of monitoring. Sometimes treatment periods can be reduced or exceeded depending on the Japanese knotweed infestation at the property and surrounding areas.

Step 3 - Implementation of the management plan:

  • Monitoring will take place twice over the Japanese knotweed-growing season. Knotweed treatment is most successful when taking place at the end of the knotweed-growing season during the second monitoring visit. The knotweed plant has reached its optimum growth, so the herbicide can have maximal effect on the plants root system. Records and photos will be use to document the progress and success of each visit. Any changes in knotweed distribution or new growth outside of the original infested area will be recorded and advice for treatment options given.
  •  Two reports a year will be provided with a summary of work carried out; effectiveness of the seasons control actions, assessment of risk of spread or re-infestation.
  • Monitoring period; if there is no evidence of any new Japanese knotweed growth after the last treatment a two-year monitor period will start at this point.
  • Completion certificate; once there has been no knotweed growth for two consecutive years a completion certificate will be provided.
  • A ten-year Insurance Backed Guarantee can be issued at the start of the treatment plan if required

Speak to an operative

Contact APSL Japanese Knotweed Ltd.
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