SCOTLAND has the best public gardens in the UK with one that aims to save plant species threatened with extinction top of the pile, according to new consumer research. A public vote has placed Logan Botanic Garden, at Port Logan near Stranraer, one of the four Royal Botanic Garden Edinburgh sites which is home to some of the world's rarest plants, as a clear number one in the study. And half of the best ten are in Scotland with Dawyck Botanic Garden at Stobo in the Scottish Borders, another of the RBGE sites and famous for some of Britain’s oldest and tallest trees coming joint second with an 89% score along with Coleton Fishacre House and Gardens in Devon.