RHODODENDRONS

WHY IS IT A PROBLEM?

This invasive shrub spreads by prolific seeding and then layering of branches. This eventually forms a closed canopy that shuts out most light and destroys the rich biodiversity of our woodlands.

It threatens and/or causes trouble for a variety of landscapes and habitats (including ours!):​

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• Woodland habitats – Protecting and restoring the native woodland is a major conservation priority. One of the greatest threats to these woods is the highly invasive R. ponticum.

• Waterways – Along watercourses the overhanging bushes cast dense shade and suppress algal growth. Slow decomposing leaf litter degrades the soil and effects invertebrate abundance and biodiversity, so damaging the ecology of freshwater ecosystems.

• Heathland – R. ponticum seeding out from woodlands rapidly spreads to the heath and bogs beyond. The damp acidic soils here provide a perfect seed bed for the invader!

• Grazing and livestock – R. ponticum is toxic to most herbivores such as sheep and deer. Hungry deer have been known to die after browsing its leaves. R. ponticum will colonise pastures and reduce grazing opportunity for livestock.

• Biosecurity – Rhododendron plays host to Phytopthora pathogens that can spread and kill a number of tree species.

• Public spaces – R. ponticum encroach on footpaths, riverbanks and other beauty spots.