12/03/2025
What to Look Out for When Japanese Knotweed Starts Growing in Spring
As spring arrives in the UK, many plants begin to bloom—but not all of them are welcome. One of the most notorious invasive species, Japanese knotweed (Fallopia japonica), starts its aggressive growth cycle in early spring, posing a significant threat to properties, gardens, and infrastructure. At Japanese Knotweed Elimination, we specialize in identifying and removing this destructive plant before it causes serious damage. In this article, we'll explore what to look out for when Japanese knotweed starts to emerge and why early detection is crucial.
Early Signs of Japanese Knotweed Growth in Spring
Japanese knotweed begins to grow as early as March or April, depending on weather conditions. The first signs to look out for include:
Red or purple shoots – These thick, asparagus-like shoots emerge from the ground in clusters and quickly grow into tall stems.
Rolled-up leaves – As the shoots develop, small, rolled-up leaves start to unfurl. These leaves have a distinct heart shape with a pointed tip.
Rapid vertical growth – Knotweed can grow up to 10 cm per day in peak growing season, quickly forming dense thickets.
Distinctive hollow stems – As the plant matures, its stems resemble bamboo with distinctive raised nodes and a greenish-red hue.
Zigzag leaf pattern – The leaves are arranged alternately along the stem, forming a unique zigzag pattern.
Why Early Detection Is Important
Japanese knotweed is highly invasive and difficult to remove. If left untreated, it can:
Damage property foundations by growing through cracks and weaknesses in walls, driveways, and patios.
Lower property value, as mortgage lenders often refuse to approve loans for properties with knotweed.
Spread rapidly, making control more expensive and difficult the longer it is left unchecked.
At Japanese Knotweed Elimination, we provide expert assessments and tailored removal plans to ensure this invasive plant is dealt with effectively.
What to Do If You Spot Japanese Knotweed
If you suspect you have Japanese knotweed on your property, act quickly. Here’s what you should do:
Do not attempt to remove it yourself – Knotweed spreads easily, and improper removal can worsen the problem.
Avoid disturbing the area – Cutting, digging, or moving soil containing knotweed can spread its rhizomes and cause further outbreaks.
Contact the professionals – At Japanese Knotweed Elimination, our specialists offer a comprehensive survey to confirm the presence of knotweed and provide the best treatment options.
How We Can Help
At Japanese Knotweed Elimination, we offer:
Free identification services – Unsure if it’s knotweed? Send us a photo, and we’ll confirm it for you.
Effective treatment plans – From herbicide application to excavation and removal, we tailor solutions to your needs.
Long-term monitoring – Ensuring complete eradication with follow-up inspections and guarantees.
Don’t Let Knotweed Take Over – Act Now!
Spring is the perfect time to catch Japanese knotweed before it grows out of control. If you notice any of the warning signs, don’t hesitate to get in touch with Japanese Knotweed Elimination. Our team of experts is ready to help protect your property from this invasive menace.
Contact us today for a free consultation and site survey. Let’s eliminate Japanese knotweed before it becomes a bigger problem!
