Japanese Knotweed Identification: How To Identify Knotweed

When it comes to Japanese knotweed identification, what do you look for? Lucky for you, there are a few things to look for if you suspect the plants on your property are knotweed. With that said, here is what to look for.

Japanese Knotweed Identification

Japanese knotweed usually has leaves that are shaped like a heart and they are bright green. The edges are smooth and have a flattened base, pointed tip and a rounded edge. Have a look at the leaves’ stalks because they will usually be either deep red or pink in colour.

The length of mature knotweed plants leaves can be around 4-inches, but certain species can grow to be much longer than that. Some have been known to have leaves of up to 15-inches long. Keep in mind this is a general estimate, but the length of the plant’s leaves can vary.

In the springtime, the leaves may be a deep red colour or green with red spots. Most leaves turn to a very noticeable bright green when they have fully opened. In the winter or late autumn, the leaves don’t grow until the following year, and every spring new stems form.

If you have Japanese knotweed plants, then keep a look out for small clusters of flowers, which will have a creamy white colour. A single plant can have dozens of these clusters, and each cluster will have many flowers. During the summertime, knotweed plants will have a unique appearance and you will likely be able to tell right away that they are in fact Japanese knotweed plants.

Generally speaking, in the United Kingdom the plants don’t produce seeds that can germinate. However, it still can happen and it is possible for the plants to cross-breed with other species of plants. You do not want to spread Japanese knotweed plants’ seeds just to be on the safe side. The last thing you want is to be dealing with an even bigger problem because the plants will spread like wildfire.

Japanese knotweed plants have roots that can grow up to 10-feet deep, which means getting rid of them completely can be challenging if you are not a professional or have the right equipment. Not only that, but the roots can be very thick and woody. The roots are very strong and they grow in all directions.

Furthermore, the roots can cause damage to pavements, walls and even the foundations of buildings. If a person tries to identify knotweed plants by their roots, then they have to be careful when taking a sample because if any of the plant material is spread, then more plants may reproduce. It’s always best to have an expert go to your property and they can identify the plants for you.

If you are not 100% sure if you have knotweed, then hire a Japanese knotweed specialist. They are experts in Japanese knotweed identification and they will be able to quickly tell you if you do have it. They will also be able to completely remove it, so you won’t have to worry anymore about these invasive plants.

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