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How deep do Japanese knotweed roots go?[2023]

Wondering how deep do Japanese knotweed roots go?

The roots, also known as rhizomes, can grow deep into the ground. They can reach depths of up to 3 meters (10 feet), and can spread laterally up to 7 meters (23 feet) from the parent plant. These deep and far reaching root systems make it difficult to remove all of the plant’s underground structures. It’s important to have a professional treatment plan in place, to ensure that all the rhizomes are treated and the infestation is effectively managed. Keep in mind, it’s illegal to bury or burn it on site and it needs to be disposed of at a licensed landfill site

known as rhizomes

Japanese knotweed roots, also known as rhizomes, can grow deep into the ground, typically reaching depths of up to 3 meters (10 feet). The rhizomes can spread laterally up to 7 meters (23 feet) from the parent plant. Furthermore they can also grow vertically. These deep and extensive roots systems make it difficult to remove all of the plant’s underground structures, which can cause it to regrow if not treated properly.

Rhizomes can remain Dormant

It’s important to note that the rhizomes can remain dormant for several years, but can still be capable of sprouting new growth. This is why it’s important to have a professional treatment plan in place, to ensure that all the rhizomes are treated and the infestation is effectively managed.

It’s also important to keep in mind that Japanese knotweed is considered as controlled waste and it needs to be disposed of at a licensed landfill site. It’s illegal to bury it or burn it on site, and anyone who fails to comply with these regulations can face fines or imprisonment.

If you would like up to date professional advice regarding Japanese knotweed feel free to contact Stephen our friendly surveyor on 07753682333