Japanese knotweed

Japanese knotweed is a plant species and is considered one of the most 'invasive exotics'. In other words: species that come from other countries and spread quickly and aggressively. Once the plant is established, it is very difficult to get rid of. Due to its strong growth, native plant species are displaced.

Control

This plant is virtually impossible to remove permanently. Therefore, the emphasis is on managing the existing plants and preventing their spread.

Japanese knotweed can be controlled by regularly cutting or mowing it. In general, the plant becomes smaller after a number of years.

How can you help prevent the further spread of Japanese knotweed?

To prevent this species from spreading further, we ask you to help us. You can do this as follows:

1. Do not buy this plant and do not plant it in your garden.
2. Dispose of the (remains of) Japanese Knotweed at our municipal composting site (small and large quantities). 
3. Indicate to the manager of the composting site that it concerns Japanese Knotweed. The plant remains are scorched at a temperature of 55-58 degrees.
4. A small amount can also be offered in a sealed bag at the recycling center. Please also indicate to the manager of the recycling center that it concerns Japanese Knotweed.
5. Do not compost Japanese knotweed remains yourself. The temperature in your compost heap remains too low, which means that the distribution of the compost will spread germinative Japanese knotweed remains.
6. Finally, although this is obvious, we ask you not to dump any Japanese knotweed remains in public green spaces and verges.
7. Do not spread soil containing roots of Japanese knotweed. Soil containing roots of Japanese knotweed can be taken to the municipal composting site in Sumar. At the composting site, this soil is kept separate, and the plant's germinative parts are sieved out.

In this way, we can work together to keep Japanese knotweed under control.