Berberis thunbergii f. atropurpurea 'Atropurpurea Nana'
Also known as: Japanese barberry
'Atropurpurea Nana' is a deciduous dwarf shrub to 60cm, compact and bushy in habit, with spiny stems bearing purplish-red, obovate leaves, becoming brighter in autumn. Flowers small, pale yellow, followed by deep red berries
Height: 20-30 cm; Comes in a 2 litre pot