Japanese knotweed is a perennial plant that was introduced to the UK in the 1800s. It is now considered to be an invasive species and can cause significant damage to property and the environment.

Japanese knotweed has a long growing season, from spring to autumn. The plant grows most vigorously in the summer when it can grow up to 10 cm per day. In the winter, Japanese knotweed dies back and goes dormant.

The following is a more detailed breakdown of Japanese knotweed growth throughout the year in the UK:

Spring (April-May)

In spring, Japanese knotweed shoots emerge from the ground. These shoots are typically about 10 cm tall and have heart-shaped leaves. The shoots grow rapidly and can reach heights of up to 2 metres within a few weeks.

Summer (June-August)

Japanese knotweed grows rapidly in the summer. The plant can reach heights of up to 2 meters and its leaves can grow up to 15 cm long. Japanese knotweed also produces white flowers in the summer.

Autumn (September-October)

Japanese knotweed growth slows down in the autumn. The plant’s leaves start to turn yellow and fall off.

Winter (November-March)

Japanese knotweed dies back in the winter. The plant’s leaves fall off and its stems die. The plant’s rhizomes, however, remain alive underground and will start to grow again in the spring.

It is important to note that Japanese knotweed can be a very invasive plant. It can spread rapidly and can damage property. If you think you may have Japanese knotweed on your property, it is important to contact a professional for removal.

There are a number of ways to remove Japanese knotweed, but the most effective method is to use a combination of methods. This may include:

  • Excavation: This involves digging up the plant’s rhizomes and roots.
  • Pesticidal treatment: This involves using chemicals to kill the plant.

It is important to note that Japanese knotweed is a controlled waste in the UK. This means that it is illegal to dispose of the plant without following the correct procedures. If you are unsure of how to remove Japanese knotweed, it is important to contact a professional.

Japanese knotweed can be a very destructive plant, but it is important to remember that it is not impossible to control. With the right knowledge and the help of a professional, Japanese knotweed can be successfully removed.

Call Japanese Knotweed Elimination Ltd today for help with identifying Japanese knotweed.