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Blue Chaste Tree - Vitex agnus-castus
A tree that produces blue flowers? Yes! Some people call this the "Sage Tree" because the striking, pretty spikes of violet-blue flowers resemble that of blue sages (Salvia). More details below!

Blue Chaste Tree - Vitex agnus-castus

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Vitex - Chaste Tree
Vitex agnus-castus 

USDA Plant Hardiness Zones: 5a-9b  Find Your Zone >

Special Attributes

A tree that produces blue flowers? Yes! Some people call this the "Sage Tree" because the striking, pretty spikes of violet-blue flowers resemble that of blue sages (Salvia). When young and in bloom, many also mistake this tree for butterfly bush. An abundance of flowers are produced during late spring to early summer. if there's average or adequate rainfall or irrigation during the summer, you can expect another good flush of flowers in late summer or early fall. The 5-lobed leaves, which resemble those of Japanese maple or cannabis plant, is pleasantly aromatic. 

The flowers of the Chaste Tree are very attractive to butterflies, hummingbirds and beneficial pollinating bees. If the spent flowers are left on the tree in fall, seeds will form that Cardinals and other birds absolutely love to dine on during the winter months. So, if you are into feeding the birds, this is a must have tree that will provide a free source of food for them.

Landscape & Garden Uses

Depending on your preference, Chaste Tree quickly grows into a multi- or single-trunk shrub or small tree to about 15 to 20 feet tall and 15-18 feet wide. In design, we use it as we do upright Japanese maple: as a focal point specimen tree, in groupings of three or more where space allows, or to frame in the corners of homes and other structures. Grown as a shrub, when planted in straight or staggered rows it makes a colorful hedge, and looks especially nice around garden ponds and other bodies of water and in rock gardens. A worthy addition to bird, butterfly, and pollination gardens!

Spacing:  8-10' for solid hedge; 22' + for space between plants

Cultural Preferences

Chaste Tree will grow in most any average soil, including clay soils. It prefers a moist but well-drained soil however will tolerate temporary wet conditions. As with so many other ornamental shrubs and trees, constantly wet soil can be problematic. Good drought tolerance when established.

Note:  The chaste tree is cold hardy in USDA Zones 5a-9b. In USDA Zones 5 and 6  young plants might die back to the ground during an unusually cold winter. If so, cut the plant back to the ground like you would a butterfly bush and it will quickly regrow to a 4 to 6' shrub.

Helpful Articles

Click on a ink below to get helpful advice from our experts on how to plant and care for Vitex Chaste Trees.

Plant Details

USDA Plant Hardiness Zones: 5a-9b  Find Your Zone >
Plant Type:  Deciduous Flowering Shrub or Tree
Height at Maturity:  15-20'
Width at Maturity:  15-20'
Spacing:  8' for solid hedge; 20'+ for space between plants
Growth Habit / Form:  Bushy, Broad, Upright
Growth Rate: Very Fast
Flower Color:  Light Blue
Flower Size:  Large, 8-12" long x 1" wide
Flowering Period:  Mid-late Spring through Summer
Flower Type:  Single, in long panicles
Fragrant Flowers:  No
Foliage Color:  Medium Green
Fragrant Foliage:  Yes, aromatic
Sun Needs:  Full Sun or Mostly Sun, Morning Sun with Dappled or Afternoon Shade, Morning Shade with Evening Sun
Water Needs:  Average, Low when established
Soil Type:  Clay (Amended), Loam, Sand, Silt 
Soil Moisture / Drainage:  Well Drained Moist to Poorly Drained
Soil pH:  6.0 - 7.5 (Slighty Acidic to Slightly Alkaline)
Maintenance / Care:  Very Low when left in it's natural form
Attracts:  Pollinating Insects, Visual Attention, Songbirds, Hummingbirds
Resistances:  Deer, Disease, Heat, Insect, Wet Soils

Plant Long & Prosper!

Questions? Contact Us!

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