Rowallane Garden is a National Trust property located immediately south of Saintfield, County Down, Northern Ireland on the A7 road. It is particularly noted for its extensive collection of azaleas and rhododendrons.[1] It is also home to the National Collection of penstemons.[2] It opened on 16 May 1956 by Lady Brookeborough after being taken over by the National Trust in July 1955.[citation needed]