Lavandula stoechas Primavera

Lavandula stoechas cultivars, called Spanish Lavender in th U.S. and French Lavender in th U.K., are tender plants flowering in early summer with harsher, more resinous oils. Lavender flourishes in dry, well drained sandy or gravelly alkaline soils in full sun. High humidity and constantly wet soil in summer and winter will contribute to root rot. 
USDA zones 7 to 9.
Height: 18’'
Small deep purple blooms topped with purple flags that keep flowering even in Southern heat.