Hyssopus Officinalis

Hyssopus officinalis — AKA "hyssop" — has been used for centuries for a variety of purposes, from cleansing to perfume.

Hyssop provides a rare, season-long burst of blue in the garden that’s hard to beat. From a distance, it appears almost like a short lavender plant. Closer, the vibrant blue flowers against the deep green foliage make a striking contrast.
Photo courtesy www.RareSeeds.com