Purging buckthorn (Paide bréan) A bushy, deciduous shrub that is native to Ireland, parts of Europe and much of Asia. Rhamnus cathartica has bright green glossy foliage and bears tiny green-white flowers which are very attractive to bees; the flowers are followed by shiny red berries that eventually turn black in the Autumn. It has a suckering nature - often mistaken for dogwood. Purging buckthorn is also good for birds and insects and is the main food for the Brimstone butterfly. Site: Requires shelter from coastal windsSoil: Any well-drained soil, thrives on lime Position: Full sun to part shadeSeason of Interest: Autumn berries and yellow Autumn colourHardiness: Frost-hardyHeight: up to 15ft (4m) Spread: up to 15ft (4m)