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The finer leaf texture and more controlled size (it's less leggy than the species, but is still not puny at 8-10' tall) make Delta Blues chastetree an attractive big shrub, but when it flowers, goodness!
It's loaded with blue flower cones for a long time during some of the toughest months of the year - the blahs of late summer (though I'm sorry, I can't commit to whether the flowers are blue or lavender - it shifts on me).
Flowering starts during the oppressive hum-drum of late summer time and last through the pick-me-up of early fall (September in Zone 8a).
Same goes for committing to leaf color - is it light green or light gray-green (won't you let us know in a review?)?
Maybe these hard to pin down traits make it so very interesting in the shrub border - it changes by time of day, like the forest outside my office window.
Delta Blues chastetree is a First Editions® plant developed in Georgia; this one by Matt Dirr.
Vitex agnus-castus Delta Blues is a mid to back of the border pollinator plant with blue flowers and fine leaf texture - can you name another shrub with blue flowers and fine texture to fill the back or your border?
the fine leaf texture contrasts nicely with the broad leaf texture of other shrubs
coupled with that fine texture, the light green (maybe slight gray-green color) leaf color gives leaf variety to the plant pallet
long flowering period: summer/late summer into early fall
climate challenges: drought tolerant once established
interesting for designers
Delta Blue chastetree
USDA Hardiness Zones
flowering shrub, deciduous
Spring: light green
Summer: light green
Fall Leaf Color Quality
long cracking blocks, gray
Native to USA?
Soil Moisture Requirements
average garden, moist-but-draining, dry, no standing water
Soil pH Requirements
acid, neutral, alkaline
full sun, part shade
To Make It Thrive
Give it full sun and a warm climate.
Is this cold hardy in zone 6? Yes it's root hardy, but the branches may not be hardy. It will likely behave more like a perennial that dies to the ground and grows back 3-4' during the summer.