Cytisus Porlock The Cytisus Porlock is certainly a colourful variety and makes an ideal shrub in borders or rockeries. This Broom won an RHS Award of Garden Merit and provides fantastic ground cover for banks and open locations. A perfect specimen for coastal areas where a multitude of fragrant, golden, pea-like flowers brighten from March to April. The low maintenance Cytisus Porlock assembles a rounded, spreading mound of stems illuminated with small, silvery-green leaves that remain semi-evergreen throughout Winter. Height and Spread: 250cm (98”).