40 seeds. Salvia nemerosa. Perennial. 
 
Salvia 'Blue Queen' has spikes of purple flowers that bloom through June and July.
 
Hardy in zones 4-8.
 
Height 15 inches. Spacing 15 inches.
 
Sowing Salvia Seeds
 
Start seeds indoors 6-8 weeks before the last frost date. Barely cover the seeds with soil. Full sun.