From Proven Winners:

A long blooming perennial that’s perfect in small areas of the landscape. Indigo blue flowers are produced all the way from the soil to the tips, providing an intense splash of color when it’s in bloom. Rosy purple calyxes extend the color when the blooms are past peak.
Best Seller
Fragrant Flower
Fragrant Foliage
Continuous Bloom or Rebloomer
Long Blooming
Heat Tolerant
Drought Tolerant
Attracts:
Bees
Butterflies
Hummingbirds
Resists:
Deer
Rabbits
Grows 12-14" tall and 18-20" wide in full sun

Photo courtesy of Walters Gardens