Specialists from Garden Buildings Direct have advised people against becoming “unwitting criminals” by familiarising themselves with what their garden is and isn’t permitted to contain.
One rule carries a potential £20,000 penalty.
The specialists advised people to verify that trees in their gardens aren’t safeguarded before harming, working on, relocating or destroying them.
A small disused quarry was being overrun by Japanese Knotweed, a pretty plant in flower, but invasive. Near Wadebridge Cornwall today. There’s a small Weevil on the last photo too!
Reynoutria japonica pic.twitter.com/4M2ROQevsR
— Sylvatica (@Botany2021) August 27, 2025
They warned: “Important trees are protected by Tree Preservation Orders (TPOs), which restrict homeowners from being able to remove or prune them, even if they are in their own garden. Disturbing a tree protected by a TPO without proper permissions could lead to a fine of up to £20,000.”
It’s quite common for someone just beginning their gardening adventure to identify the plants they have purchased incorrectly.
Still, it’s certainly worthwhile learning which species are invasive, as these could land you in trouble not just financially.
The specialists highlighted Japanese Knotweed, which can appear visually attractive, as one of the most problematic.
This Knotweed is infamous in gardening circles for its destructive potential, as it could even damage your home or spread into your neighbours’ gardens, causing widespread problems.
The introduction of any invasive plants into your garden was prohibited in 1981 under the Wildlife and Countryside Act.
What is Knotweed?
Knotweed, most commonly Japanese knotweed, is a fast-growing, invasive perennial plant known for its rapid spread and ability to cause significant damage to structures and native ecosystems.
It has shovel-shaped leaves, bamboo-like stems, and produces white flowers in late summer and autumn. Because of its aggressive nature, which can compromise foundations, disrupt drainage, and outcompete other plants, it is a significant problem and requires careful management.
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