Cotswold Lifestyle

Welcome to my Lifestyle Blog from The Cotswolds

How to Deal with Japanese Knotweed

While many volunteer plants are quite welcome in our gardens, knotweed is definitely not one of them!

Knotweed was introduced to the United Kingdom in the 19th century. Originally, it was quite popular thanks to its ability to screen off an area of the yard or property. Unfortunately, knotweed is also quite invasive and today, it’s a blight. Thanks to part of the rules and regulations for conveyancing, sellers must now state whether or not knotweed is present within three metres on their property or an adjoining property.

While the very term knotweed can strike fear into even the most experienced of gardeners, it’s still relatively easy to manage knotweed if you know how.

Thanks to their rhizomes (special roots), and the way that the rhizomes can extend as far as seven metres from the plant itself, Knotweed can grow and regenerate in nearly any kind of soil. It only takes a small fragment of the rhizome. Knotweed can even cause damage to nearby structures.

When first introduced, knotweed was fascinating to Victorian gardeners. William Robinson, an influential famous garden writer, suggested planting two to three knotweed in the garden area.

With heart-shaped leaves and tiny cream flower clusters, it’s easy to understand why it was widely used. Unfortunately, it has quite an ecosystem and can choke out all of the other plants in the garden. Knotweed identification should be closely followed by a plan of action to get rid of it.

How Can You Get Rid Of Japanese Knotweed?

Stick to a plan. It’s going to take several years to completely eradicate knotweed from your garden. It can rapidly spread so you want to the entire rhizome out of your garden.

Pull the stems off of the plant and remove them. Remove all of the rhizomes and in time, it will kill off the plant.

Place stems in a plastic bag and keep them away from the soil. They must completely decompose before being added to compost. As an alternative, you could also burn them.

If clumps aren’t near water, spray with weed killers such as glyphosate. Be sure to follow all of the instructions on the weed killer.

If you can’t get it out yourself, call a professional eradicator.

What Not To Do

Do not dig or move the soil around within seven metres of the knotweed. There might be pieces of rhizome in the soil according to The Garden Furniture Shop.

Don’t shred, strim, or chip the knotweed. Every fragment can regenerate an entirely new plant.

Don’t attempt to dig it out, it will renew its energy.

Don’t put it into a compost bin as it will take over. Knotweed is considered a controlled waste and you must only dispose of it at specifically licensed sites.

Never dump it, all of the fragments will regenerate and it is illegal to spread knotweed.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.