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.
Common Name: lilac chastetree  
Type: Deciduous shrub
Family: Lamiaceae
Native Range: Mediterranean, Asia
Zone: 6 to 9
Height: 8.00 to 10.00 feet
Spread: 5.00 to 8.00 feet
Bloom Time: July to August
Bloom Description: Violet / blue
Sun: Full sun
Water: Medium
Maintenance: Medium
Flower: Showy, Fragrant
Leaf: Fragrant
Other: Winter Interest