A shrub. It can grow 6 m high. The leaves are oval and taper to the base. They are 5-10 cm long by 2-6 cm wide. They are slightly rough and bright green. The flowers are in large groups arising from the side buds. The flowers can be lilac, white, or red. The fruit is a smooth capsule. There are many named cultivated varieties.
Shrub to 6 m; lvs ovate, 5–10 cm, short-acuminate, truncate to cordate at base; infls 1–2 dm; cor lilac (white), 1 cm wide; 2n=44–48. Native of se. Europe, persisting indefinitely after cult. and often appearing spontaneous, especially in regions of abandoned farms. May.