Vitex agnus-castus, also called vitex, chaste tree (or chastetree), or monk's pepper, is a native of the Mediterranean region. It is one of the few temperate-zone species of Vitex, which is on the whole a genus of tropical and sub-tropical flowering plants.
Vitex agnus-castus is widely cultivated in warm temperate and subtropical regions for its delicate-textured aromatic foliage and butterfly-attracting mid-summer spikes of lavender flowers opening in late summer in cooler climates. It grows to a height of 1–5 m (3–16 ft). It requires full sun though tolerating partial shade, along with well-drained soil.