Question on Centaurea Montana...mine just finished blooming should I cut it
back or will it continue to bloom on it's own?


Note that there is also a perennial 'Bachelor Buttons' - Centaurea
Montana [aka Mountain Bluet].
http://www.daytonnursery.com/Encyclo.../Centaurea.htm

5 feet high is a stretch-- but the flowers range from bright blue to a
violet. And the flowers last all summer .

Jim