I have the opposite problem... my blooms are always pink, and I can't get any blue ones! I also wait until the leaves form to prune. It looks strange for a month or so, but if I cut the stems before that, they don't bloom. Two years ago, my bushes started flowering, but the flowers all faded and shriveled. Not sure what happened. This year, I hardly had any blooms on that bush. Hopefully this year they'll make a nice showing!
I have the opposite problem... my blooms are always pink, and I can't get any blue ones! I also wait until the leaves form to prune. It looks strange for a month or so, but if I cut the stems before that, they don't bloom. Two years ago, my bushes started flowering, but the flowers all faded and shriveled. Not sure what happened. This year, I hardly had any blooms on that bush. Hopefully this year they'll make a nice showing!