As spring blooms around us and the weather begins to improve, it also marks the return of the persistent: Japanese knotweed. This invasive species will start to rapidly grow in May-June depending on weather conditions. Despite that it may seem like an ordinary plant, Japanese knotweed is quite the troublemaker. Let’s delve into what it is, how to spot it, and why it’s crucial to deal with it promptly.
Identifying Japanese Knotweed
Japanese knotweed is a perennial plant that poses a threat to ecological balance and infrastructure. In the early stages of spring, eyes can spot the signs of Japanese knotweed’s emergence. Look for shoots resembling asparagus piercing through the soil. These shoots soon transform into foliage with shield-shaped leaves and bamboo like stems often with purple speckles. By late summer, clusters of small white flowers emerge, contributing to its spread through airborne seeds.
Why is it Important to Treat?
Without early treatment, Japanese knotweed’s rapid expansion can destabilize soil and alter local habitats. Moreover, its resilient root system can wreak havoc on structures and pose a threat to development sites, necessitating costly action plans. By disturbing the soil, broken stems and seeds, soon knotweed turns into dense clusters that are challenging to contain. To control Japanese knotweed’s encroachment, two primary approaches are employed: herbicide treatment and physical removal.
When and How is it Managed?
Herbicide Application Methods:
Herbicide targets Japanese knotweed’s vascular root system, effectively halting its growth. Timely application during the growing season maximizes efficacy, curbing the plant’s spread. For the most effective route to eradication, 2-3 applications per year are recommended depending on the establishment of the plant, weather, and soil conditions. May-June are the most effective times to start treatment for the season
Physical Removal:
Physical removal involves excavating the entire plant, including its extensive root network. When coupled with herbicide treatment to address regrowth, this method yields promising results especially during projects with time constraints such as land re zoning for development sites.
Take Action
The onset of spring signals the beginning of a seasonal battle against this invasive species. At the first sight of shoots or green foliage from overwintered plants, contact us! Western Weed Control is ready to assist and will ensure you are in our schedule for May-June treatment. offering expertise in the management and eradication of invasive species. Let’s come up with the right action plan for your property today.
