Beautiful, stately perennial can grow to 6 feet. Native to North America it enjoys a moist location flowering in summer with narrow spikes of intensely blue miniature blooms. One of my very favorite flowering herbs. Traditionally used by native Americans as a relaxant. The seeds were also eaten as a food. Historical use is documented for insomnia, expelling worms, repairing a damaged liver or spleen and a cure for fits and seizures. Excellent ally for unrelenting mind chatter keeping you awake at night!! A beautiful plant for the back border of the herb garden. Very hardy Perennial to zone 3.