Something different again - Chattahoochee has tall, willowy stems ending in large heads of mid-blue flowers with purple eyes.
It likes a position sheltered from the wind (the tall, top-heavy stems are prone to breaking with the size of the flowers) and a well-drained soil that doesn't dry out. The flowers have a wonderful fragrance. About 25cm (10") or so tall and grows as a clump, not flat and spreading.
A classy plant in every way - and it holds an Award of Garden Merit.
Ful name Phlox divaricata subsp. laphamii 'Chattahoochee'.