Purple Dome Aster Ready to Explode

My 'Purple Dome' New England Aster is ready to blow up, but will it bloom in August or wait until September? Side note, I can't believe it's almost September!!! This Aster novae-angliae 'Purple Dome' has been growing and growing all summer, and started as a little 2 inch plug I got by mail.  Who knew it would grow into a bush like this in one season?

Aster novae-angliae 'Purple Dome' August 13, 2015

August 24, 2015 even closer to blooming!

Here's a baby photo from this Spring, holy cow!!