Ireland's efforts evolve over half a century to try and control the invasive rhododendron
In the last five years, there has been approximately €2.7m spent on rhododendron management at Killarney National Park between treatment and monitoring. Picture: Don MacMonagle
May and June are traditionally considered to be the main flowering period for rhododendron.
The plant provides a splash of colour on many landscapes including national parks, but one variety has a less attractive side because it poses a serious threat to nature.
