Berberis buxifolia ‘Nana’ (= B. buxifolia ‘Pygmaea’; B. dulcis nana)
Habit: Roundish, dense dwarf shrub, rarely taller than 0-3 (0.5) m, very slow-growing, shoots hardly thorny.
Flowers: Flowers and fruits rare.
Leaves: Evergreen, elliptical, leathery, blue to dark green, red margins.
Demands: Sunny to semi-shady; usually frost hardy.
Soil: Any garden soil, fresh to moderately dry.
Note: Takes very well to cutting.
Hardiness: Zone 5a