The chaste tree, which is really a shrub, is a good choice for the shrub border or as a specimen. The upright clusters of lavender-blue, summer-blooming flowers and aromatic gray-green leaves attract butterflies. In northern region, chaste tree should be cut to ground in early spring.
This plant has some cultivated varieties. Go to list of cultivars.
- Mixed border
- Medium shrub (5-8 feet)
- Small shrub (3-5 feet)
- Full sun (6 hrs direct light daily)
- Zone 6
- Zone 7
- Zone 8
- Moist, well-drained soil
- Deciduous (seasonally loses leaves)
- Early summer
- Mid summer
- Late summer
- Early fall
Size and form
Often considered a sub-shrub in northern climates.
Plants flower on new wood developed the same year.
May reach 8 to 10 feet high and wide.
Tree & Plant Care
Plants require well-drained soil in full sun.
Marginally hardy. Cut plant to the ground in early spring for best flowering.
Disease, pests, and problems
leaf spots and root rots in too wet soils
Native geographic location and habitat
Southern Europe and western Asia
Attracts birds, butterflies, and pollinators
Birds and butterflies are attracted to flowers
Bark color and texture
Twiggy grey stems get woody abd blocky in appearance
Leaf or needle arrangement, size, shape, and texture
Opposite; 2 to 4 inches long, palmately compound leaves with 5 to 9 lealfets radiating from a central stalk; narrow and elliptical; gray-green in color
Flower arrangement, shape, and size
Purple to lavender, 3 to 6 inch long flower spikes at tips of branches
Fruit, cone, nut, and seed descriptions
A small persistent drup; not showy
Cultivars and their differences
Blue Diddley® Chastetree (Vitex agnus-castus 'SMVACCBD'): A dwarf chaste tree reaching 3 to 6 feet high; laveder-blue spikes; good for containers
Blue Puffball™ Chastetree (Vitex agnus-castus 'PIIVAC-II'): A First Editions® dwarf, 3 feet high and wide, compact shrub with medium green foliage; deep blue fragrant flower spikes.
Delta Blues™ Chastetree (Vitex agnus-castus 'PIIVAC-I'): An 8 to 10 feet high and wide, upright-spreading to rounded habit; dark, purplish-blue flowers and small shiny, reddish fruit.