Overall , the species is considered of little horticultural merit and is also comparatively short - lived .
The flowers form dense , drooping terminal panicles < 20 cm long , usually pale lilac in colour , from July to October .
The species is considered of little horticultural merit and is also comparatively short - lived .
The flowers form dense , drooping terminal panicles < 20 cm long , usually pale lilac in colour , from July to October .