100 seeds. Agastache rugosa. Perennial.
 
Agastache 'Korean Zest' has purple flower spikes from the mid to late summer. The leaves are edible with a licorice-mint flavor. Leaves can be used for tea. Also known as Korean mint. 
 
Hardy to zones 5–9.
 
Height 20 inches. Spacing 15 inches. 
 
Sowing Agastache Seeds
 
Start seeds indoors 6 to 8 weeks before the last frost date. Barely cover the seeds with soil. Full sun.