Blue Barberry A beautiful shrub that can be trained against a wall, Berberis temolaica is a medium-sized, deciduous shrub with branches, glaucous when young, later purple. Oblong leaves are grey-green. Solitary, pale yellow flowers are borne in May, and are followed by egg-shaped berries, red with a white bloom. Good in a cottage, wildlife or informal garden. Watch out for Berberis sawfly, aphids and powdery mildew. Blue barberry holds the RHS Award of Garden Merit. Site: Tolerates exposure, including coastalSoil: Any well-drained soilPosition: Full sun or partial shadeSeason of interest: Late spring to early summer, and autumnHardiness: Very hardyHeight:  5-8’ (1.5-2.5m) Spread: 5-8’ (1.5-2.5m) in 5-10 years