04/11/2026
Invasive species – there are biodiversity-friendly alternative plants readily available
There are issues with a number of non-native / alien plants being planted in gardens & more importantly in public places all around the country. It is acknowledged that most of the non-native plants we see in the wild are not having a major negative effect (at present), even as they “naturalise” on our roadsides, parks, farms, meadows and other areas managed for wildlife.
While we all have heard about Rhododendron, Himalayan balsam (Impatiens glandulifera) & American Skunk Cabbage (Lysichiton americanus) & are aware of their negative effect on our natural environment, other visually attractive invasive species such as Snowberry (Symphoricarpos albus), Winter Heliotrope (Petasites pyrenaicus) also have negative effects perhaps not so well known about.
Some of the most aggressive invasive species can outcompete our native species – take for example the Spanish Bluebell (Hyacinthoides hispanica) which can be observed almost everywhere in woodlands, parks etc. – apparently it hybridises with our native Bluebell (Hyacinthoides non-scripta) and outcompetes it – taking over from the native species & having a negative effect on biodiversity.
So whether you are planning a planting scheme for your garden, the green area in your residential estate, or elsewhere, chose non-invasive plants & by doing so do your bit to protect our natural habitats.
This guide - developed by the National Biodiversity Data Centre is a most interesting read & should influence plant selection hopefully guiding gardeners & others in planting wildlife & biodiversity friendly plants – they point out that:
“Invasive species are one of the greatest threats to our biodiversity and habitats.”
&
“They threaten biological diversity, food security, and human health and wellbeing.”
To download ‘Choosing non-invasive plants for the island of Ireland’ visit:
Non-native plants play an important role in the economies of Ireland and Northern Ireland. Introduced for gardening, landscaping, horticulture and