Peter Dowdall: Rhododendrons are at their best right now Whether you're a gardening beginner or expert, Irish Examiner columnist Peter Dowdall has the answer to your questions The Broad Walk, Kilmacurragh. Peter Dowdall Often maligned because of one unruly family member, namely the species ponticum, rhododendron is a truly magnificent genus at their best during this time of the year. One of the best gardens in Ireland in which to enjoy them is Kilmacurragh in Wicklow and if this, one of our National Botanic Gardens is in your county, then count your blessings and get down there to enjoy it.