The listing, Vitex/Chaste Organic "Dark Knight" 20+ Seeds has ended.
Vitex, also called monk's pepper or chaste, are rapid growers, with proper fertilizing & care.Trees can grow 10' -15' tall and 15'- 20' wide as trees (see 1st photo). These need proper pruning to keep them as trees, otherwise they will be beautiful, full bushes (see 2nd photo).
In Arizona it blooms in late spring with pointing lavender flowers (last photo). This plant is hardy in USDA zones 7 to 11; it grows where the temperature does not drop below 0 degrees Fahrenheit. Vitex trees can grow throughout Arizona except in the coldest regions in the north. How to Care for a Vitex Tree in Arizona | Garden Guides http://www.gardenguides.com/118220-care-vitex-tree-arizona.html#ixzz3NH1v8JNb
For all Regions & I nformation:
http://davesgarden.com/guides/pf/go/1188/
Some people use parts of it medicinally for fertility & menopause. I don't know anything about that, but it referenced when Googled
*Important Note: The leaves of this plant are very similar to canibus (marijuana).
I used to own a landscaping company & this is a perfect plant for the high desert, as well as being beautiful. A couple of clients raised their eyes when they first looked closely at the leaves. But, when they saw the unusual, pretty flowers, they knew why I chose it for their yard.