Chaste Tree
Vitex agnus-castus
The chaste tree is a Mediterranean deciduous shrub or small tree with aromatic, palmate foliage and slender spikes of lavender-blue summer flowers that attract bees and butterflies. Its peppery berries have a long history in herbal medicine.
- Light
- Full sun
- Water
- Low to moderate; drought-tolerant
- Difficulty
- Easy
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Overview
Vitex agnus-castus is a deciduous shrub or small tree native to the Mediterranean and western Asia, grown for its long bloom season, fragrant foliage, and pollinator appeal.
From mid to late summer it produces upright spikes of small lilac-blue (sometimes pink or white) flowers above gray-green, hand-shaped leaves that release a sage-like scent when crushed.
The peppery seeds, called monk's pepper, were historically believed to suppress libido and have been used in herbal medicine, particularly for women's reproductive health. It is heat-loving, drought-tolerant, and easy to grow.
How to identify it
A multi-stemmed deciduous shrub or small tree reaching 2-6 m, broad and spreading.
- Leaves: opposite, palmately compound with 5-7 narrow, lance-shaped, gray-green leaflets; aromatic when crushed
- Flowers: small, fragrant, lavender-blue (occasionally pink or white) borne in slender terminal spikes in summer
- Fruit: small, dark, peppercorn-like berries (monk's pepper) with a spicy aroma
- Bark: grey-brown
- Habit: loose, rounded, often as wide as tall
Care & growing
A tough, sun-loving shrub for warm, dry gardens.
- Light: full sun is essential for good flowering
- Water: low once established; very drought-tolerant
- Soil: well-drained; tolerates poor, sandy, and rocky soils, dislikes wet feet
- Temperature: hardy in zones 6-9; may die back in cold winters but regrows from the base
- Feeding: minimal; avoid overfeeding
- Propagation: from softwood or semi-hardwood cuttings or seed; prune in late winter to shape and boost bloom
Habitat & origin
Native to the Mediterranean region and western and central Asia, where it grows along riverbanks, coastal areas, and dry, sunny slopes.
Widely cultivated in warm-temperate gardens worldwide and naturalized in parts of the southeastern United States, where it thrives in heat and humidity.
Uses & benefits
Valued as an ornamental, pollinator plant, and traditional herb.
- Ornamental: a long-blooming summer shrub good for borders, hedges, and pollinator gardens
- Pollinators: flowers are highly attractive to bees and butterflies
- Medicinal: the dried berries (chasteberry) are a long-standing herbal remedy, especially for premenstrual and menopausal symptoms
- Culinary/historical: the peppery seeds were once used as a pepper substitute and by monks reputedly to curb desire
Frequently asked questions
Why is it called the chaste tree?
Historically its seeds were believed to reduce sexual desire and were used by monks, earning the names chaste tree and monk's pepper.
Is chasteberry an effective herb?
Chasteberry is a traditional remedy for premenstrual and menopausal symptoms, and some evidence supports it, but consult a healthcare provider before use.
When does the chaste tree bloom?
It blooms in mid to late summer, often over many weeks, and light pruning of spent spikes can encourage repeat flowering.
Will it survive cold winters?
In zones 6 and colder it may die back to the ground in winter but usually regrows from the roots in spring.
Chaste Tree guides
In-depth guides for identifying, growing, and caring for Chaste Tree.
Chaste Tree identified by the community
Real specimens identified with Plant Identifier.
