On Thu, 30 Oct 2014 15:32:24 +0000, Jeff Layman wrote:

I hope it will continue to flower until it gets hit by frost.

Every reason to think it will, although it will get a bit weedy at the
end. We used to do these every year, I'm not sure why we stopped.

BTW I've collected seed and grown it, it came out standard purple. YMMV,
of course.

-E
--
Gardening in Lower Normandy