Posted: 03/08/2016 at 15:10
I have grown Brookside, Orion, Rozanne, Jolly Bee and Johnsons Blue.....had a thing for hardy geraniums once.
I found Brookside to be shorter blooming than Rozanne and more blue. I have Brookside in a corner and recently cut back hard so just foliage there for 3 weeks or so. Rozanne, for me,,goes on and on and I never cut it back. More purple than blue.
here hardy geraniums make big spreading plants so I have removed many to accommodate other preferred plants.......apart from the blues I have Ann Folkhard, Elke, Wargrave Pink. Coombland White, and Elke.
however, Johnsons Blue does not flower for very long and I found ir a very over rated plant. It collapses when in full flower and the foliage quite thin
my choice of blues would be Orion, Rozanne and Black Beauty ...this has plum foliage and gemtian blue flowers in mid summer but soon goes over. Cut back and it often flowers again for a short time. Always wanted Blue Cloud for a paler blue