Mealycup Sage (Salvia farinacea 'Victoria Blue') has been blooming profusely without deadheading here in zone 6b since spring. It is a very popular annual here in spring and is available in inexpensive four packs or six packs.
Mealycup Sage (Salvia farinacea 'Victoria Blue')
Here is my garden as it appeared on October 8; Victoria Blue is circled In white; it has begun to decline (as of October 17) but is still blooming; it is too windy to photograph today:
