I get asked frequently How do you get rid of knotweed naturally without using herbicides in
Well, there are several natural methods for controlling or getting rid of Japanese knotweed. It should be noted that none of these methods are completely effective on their own. Typically multiple methods are required for successful control.
Japanese knotweed has deep underground rhizomes. Manually digging up the roots is the most effective way of controlling it. However, care must be taken to ensure that all roots and rhizomes are removed. Even small fragments can regenerate into new plants. there are not many companies that can 100% remove Japanese knotweed due to human error.
A biological control method involves using a knotweed leaf beetle (Chrysolina suturella) that feeds on the leaves of the plant. This method can be effective in reducing the growth of the plant over time. It’s not a quick fix. The insects will only eat small amounts of the leaves, and the rhizomes are mainly unaffected underground. Furthermore, more the beetles don’t like cold climates they will die.
Grazing animals such as cattle or sheep can be used to control the growth of Japanese knotweed. They will consume the leaves and shoots of the plant. This method should be used with care as it can be ineffective or even harmful. If the animals are not properly managed. grazing animals can make the situation worse by spreading the rhizomes to other areas resulting in more growth, They may get small fragments of rhizomes stuck in their hooves.
It’s important to keep in mind that even with a combination of these methods. It may take several years to fully get rid of Japanese knotweed and it is important to be vigilant and continue to monitor the area to prevent its regrowth.