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Why is Winter a good time to tackle Japanese Knotweed?
By Ross Cheeseright

Why is Winter a good time to tackle Japanese Knotweed?

Question: Why is Winter a good time to tackle Japanese Knotweed?

Answer: Winter is ideal for tackling Japanese Knotweed as the plant is dormant, making it easier to excavate and remove the crown and rhizomes without disturbing new growth.

A Closer Look: 

Winter is a good time to address Japanese Knotweed (Fallopia japonica) infestations because the plant is in a dormant state. During this period, the above-ground canes are brown, brittle, and devoid of leaves and flowers, making it easier to access and target the underground rhizome system. The lack of active growth means there is less risk of disturbing new shoots, which can complicate removal efforts during other seasons.

Excavating and removing the crown and rhizomes in winter is particularly effective as the plant’s energy reserves are concentrated in these underground structures. By targeting these critical components, it is possible to reduce the likelihood of regrowth significantly. Additionally, winter removal minimizes the environmental impact, as there is less foliage to manage and fewer disruptions to the surrounding ecosystem. This strategic timing can lead to more efficient and thorough eradication efforts, setting the stage for successful long-term management

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