Interesting shrub or sub-shrub, that can treated as perennial. Form with cut leaves (grayish on the bottom), small fragrant lavender-blue flowers in July-August. Hardy in zone 6-9.
From distance looks like strange "japanese maple" or "hemp".
Can be grown as little shrub, and can reach up to 15' of height x 8-10' of width. But can be cut back every spring (because it flowers on new stems), in which case will look more like giant 5-6' tall Russian Sage (Perovskia) In cooler areas (zone 5 or 6), may die back in harsh winters, but will re-sprout from the base (similar behavior like Perovskia, Lagerstroemia - Crape Myrtle, or another more common Chaste Tree - Vitex agnus-castus).
Full sun, half sun, average to dry soil - some drainage is key to success (sandy, gritty, gravelly soils)/ Don't plant in waterlogged soils or wet clay.
Pollinator friendly - attracts honeybees, some native bees and butterflies.
For sunny flower beds, or as a background for flower beds.
Picture copyright : peganum, Commons Wikipedia
Pot size : square 3.5" x 4" deep perennial pot