Hebe diosmifolia is an evergreen bushy shrub, growing to about 40 in (1 m). It has narrow, lance-shaped, dark green leaves, which tend to lie in one plane; about 0.7 in (18 mm) long, the edges are minutely incised. The flowers are pale lilac, and form in clusters near the branch tips, later spring. This hebe is tender in the UK, although it might tolerate a light frost.
This hebe is found in scrub and forest edges to the north of the North Island, where its distribution is rare and local. A variable species which is widely grown in New Zealand.