M. sylvestris 'Brave heart' has a tendency to bloom itself out; blooming early to frost.
Malva sylvestris 'Brave Heart' (aka. 'Braveheart')
Hollyhock Mallow 'Brave Heart' - growing in part-shade, southern exposure, zone 8a
This plant is still flowering 6 months later on Dec. 26th.
Over 6' high; September 2006. It sprang up on its own in springtime...from seeds that made it into the compost bin!