Dragonhead (Dracocephalum ruyschianum 'Blue Dragon')

Our own selection of this species has dark blue snapdragon flowers covering a low, thick mound of rosemary-like foliage in early summer. Compact in a container and very easy to grow, just treat it as you would a Dianthus. It has been reliably hardy in Landenberg through rain and drought for many winters. Needs good drainage.
 
Zone: 3 to 7 
Height: 0.50 to 1.00 feet 
Spread 1.00 to 1.50 feet 
Bloom Time: July to August 
Sun: Full sun to part sun 
Water: medium 
Maintenance: Low 
Tolerate: Drought, Dry Soil