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Contact TCM Knotweed

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Contact TCM

Contact the our specialists at TCM by completing this contact form, or you can call or email us directly using the information listed on this page.

If you suspect you have Japanese knotweed on your property but would like confirmation, please send us an image. You can upload an image here and one of our invasive weed experts will be in touch with you as soon as possible.

Start your journey to being Japanese knotweed free with TCM Ltd.

TCM Limited

Unit 3, Gable End Courtyard,
Hall Street, Long Melford,
Sudbury, Suffolk,
CO10 9JT

0330 6781077

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Opening Times

  • Monday: 8:30am – 5pm
  • Tuesday: 8:30am – 5pm
  • Wednesday: 8:30am – 5pm
  • Thursday: 8:30am – 5pm
  • Friday: 8:30am – 5pm
  • Saturday: Closed
  • Sunday: Closed
Howard Downer


Howard Downer, AKA Dr. Knotweed, has over 20 years of experience as an Environmental Consultant and is regarded by his peers as one of the most knowledgeable people in the Japanese knotweed industry.

Follow Dr. Knotweed to hear about the latest developments regarding Japanese knotweed and the implications of infestation.

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