I received the plant in my spring order and got it into a 20 inch container (think I had another salvia in there too) and the first bloom was 9/5. I didn't get it into the container right away, so maybe it was "on time" for the first flower on 9/5. I'm pretty sure it's a late summer - early fall bloomer. Don't know if it would've bloomed earlier or later than 9/5, as it was my first time growing a regla type of salvia. I'd love to grow another regla type of salvia again some day.
FBTS offers
'Royal'
http://www.fbts.com/salvia-reg...
'Huntington Gardens Form'
http://www.fbts.com/salvia-reg...
'Jame'
http://www.fbts.com/salvia-reg...
Queretaro form
http://www.fbts.com/salvia-reg...
Looks like he out of them at the moment. You can the "Email when back in stock" button, list your email addy and then be notified by email when it's back in stock with any of his plants that are out of stock.
Have you ordered from FBTS before?
http://www.fbts.com/
Being zone 8a, do you get frost and/or freeze? I know you have a lot longer growing season and some plants I grow as annuals, you can grow as perennials.