Japanese knotweed: how do you get rid of it?
Why Japanese knotweed is so persistent, what Belgian law has said since 2025 and the methods that really work in a garden.
In Brussels you cannot simply fell any tree you like, even in your own garden. The rule depends on the size of the tree and the type of work. Here are the key points before you start.

Under Brussels planning rules, a standard tree (arbre à haute tige) has a trunk of at least 40 cm in circumference at 1.50 m above the ground and is at least 4 m tall. These are the trees that require a permit.
There is an exemption for felling a dead or dying tree, except in certain protected green areas and Natura 2000 sites.
Maintenance pruning is exempt. It removes dead or diseased wood and a few healthy branches while keeping the tree’s size, shape and vigour. To stay within this scope, the healthy branches cut must not exceed 22 cm in circumference, or the pruning must not remove more than a third of the crown. Trees listed as remarkable follow stricter rules.
Even with a permit, the Brussels Region prohibits felling trees and pruning them with power tools from 1 April to 15 August, to protect breeding birds. Autumn and winter are therefore the best times for this work.
The Civil Code sets minimum distances: 2 m from the property boundary for trees 2 m tall or more, and 50 cm for other plants, unless agreed otherwise with your neighbour. Keep this in mind from the garden design stage.
During the free visit, we measure the tree, assess its condition and tell you whether a permit seems necessary. If so, allow for the processing time of the application with your municipality before setting a date. We then carry out the pruning or felling safely, removing all wood and branches.
This article gives general guidance. Rules change and can differ between municipalities: always check with your municipality before starting work.
Tree pruning at height by climbing arborist or aerial platform, sectional felling and stump removal.
A yearly or seasonal subscription, or a one-off visit, to keep your garden neat all year round.
Designing a new garden or a complete makeover: layout plan, plant selection, groundwork and planting.
Why Japanese knotweed is so persistent, what Belgian law has said since 2025 and the methods that really work in a garden.
Hydrangeas and roses are not all pruned the same way. The right time and technique for each variety, for a garden in bloom all summer.
Height, materials, party fences: the rules for putting up a garden fence in Brussels, Wallonia and Flanders, and how to choose the right one.
When to sow a lawn in Belgium, when to choose turf instead, and how to prepare the soil and water for a dense lawn from the very first year.
Pros and cons of cherry laurel, thuja and native mixed hedges, distances to keep from your neighbour and the hedge planting grant in Wallonia.
Glyphosate, salt, vinegar: what the law allows householders in Brussels, Wallonia and Flanders, and effective methods for paths and patios.
The best times to trim a hedge in Belgium, the species that need special care, and the bird nesting season to respect.
Moss, thatch, patchy grass: when to scarify your lawn in Belgium, how to go about it and what to do right after for a dense lawn.
Tell us about it in two minutes. We will get back to you quickly to arrange the visit, Monday to Saturday.
This website sets no advertising or tracking cookies. With your consent, we load the mood videos on the home page from Cloudinary, which then receives your device’s IP address. Without consent, a photo is shown instead. Cookie policy