Blue Vitex (Vitex agnus-castus), commonly called chaste tree, is typically grown in warm winter climates as a vase-shaped, deciduous shrub (to 10-15′ tall) or trained as a single trunk tree to 20′ tall. In cold winter areas in USDA Zones 5-6, it is more often grown as a 3-5′ tall herbaceous perennial. Features aromatic, compound, palmate, grayish-green leaves with 5-7 lance-shaped leaflets (each leaflet to 6″ long) and tiny, fragrant, lavender to pale violet flowers appearing in loose panicles (to 12″ long) in mid to late summer. Flowers are quite attractive to butterflies.