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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.
Best grown in loose, medium moisture, well-drained soils in full sun. Plant in sheltered locations north of USDA Zone 7. In USDA Zones 5 and 6, this shrub often suffers winter dieback or dies to the ground. It is not considered reliably winter hardy throughout USDA Zone 5. Even though plants may die to the ground in Zone 5-6 winters, the roots often survive the winter and push up as much a 4-7 of new growth the following year.
Seeds have been tested for germination.
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