@jg0613 Judy,
Here's the database for Midnight.
Salvia (Salvia leucantha 'Midnight')
Looking at my pics shown, I see I've some pics that were taken around mid September, as well as, in October and November. In the many years (every year), Midnight may have started blooming before mid September, but I don't get around to taking pics. This is one of the plants that I planted in the ground and I think it started blooming before the ones in containers. Don't remember when, but it was much earlier than the date shown on the pic.