Centaurea montana is another ‘useful’ perennial plant that I end up dividing and removing chunks of each year. its common form. montane knapweed or perennial mountain cornflower, is a lovely shade of blue. The patch at the front of the Magic Garden os showing vigorous growth already so I may lift a bit soon so that I can establish some elsewhere in the garden. It is very attractive to the bees and is an easy bloomer that can be persuaded to repeat all summer.

Besides the common form I also have a much smaller patch of Centaurea montana ‘Purple Heart’