The Isle of Man Woodland Trust is warning against the 'invasion' of cherry laurel.
The charity says the plant, which was introduced to Britain in the 19th century, has become a favourite among the Island's gardeners.
However, cherry laurel can quickly escape gardens and when left uncontrolled, form impenetrable thickets that shade out native vegetation.
The Woodland Trust instead recommends planting something native, such as holly or beech, to help pollinators and increase biodiversity.