How do I remove Japanese Knotweed?

Japanese Knotweed will not compost and does not respond well to cutting or in-situ burning which often actually stimulate increased growth.
Cutting and pulling the plant from the ground is not advisable as this can also stimulate new growth.
Chemical treatment using domestically available products will work with repeat applications probably over several years with multiple sprays.
IF you have the time and the inclination, your best strategy would be as follows;

  1. Fence off all areas of Japanese Knotweed at least 7 metres away from surface growth.
  2. Have a foot washing facility to clean shoes when leaving contaminated area.
  3. Carry out an initial spray with a glyphosate based weed killer such as ‘Roundup’.
  4. Leave for chemical suppliers recommended period to allow chemical to be absorbed by plant.
  5. Remove all surface growth to a height of 150mm above the crown of the plant.
  6. Leave to dry in an area not subject to traffic and in piles that will not be disturbed.
  7. Incinerate all removed surface growth.
  8. Check Environment Agency web site for document entitled Management of Japanese Knotweed and look at pictures of rhizome to enable identification.
  9. By hand, excavate the surface crown and all visible rhizome – this may extend as deep as two metres underground and 7 meters beyond surface growth.
  10. Dry all rhizome and crown material by placing on a sheet of polythene and keeping away from moisture.
  11. Once rhizome and crown have dried out incinerate within your contaminated area.
  12. Check and monitor for re-growth over next five years.
  13. Repeat as necessary.
  14. Repeat as necessary.
  15. Repeat as necessary!

If you don't want to do this (we don't blame you) then please get in touch with us:

0161 723 2000

Japanese Knotweed Solutions Ltd
Itadori House
Melton Street
M26 4BR

You can also email us any photographs of a plant you are concerned about, and we will identify whether it is Japanese Knotweed or not.

T: 0161 723 2000

© Japanese Knotweed Solutions Ltd
Design by Blueleaf