I am partial to blue in the garden. I keep Forget Me Nots just so I can enjoy a lengthy blue bloom in my backyard. It's a sacrifice, I know ;)
Once Myosotis fade, there's not much else that flowers blue in June.
Except this gem:
Amsonia is truly a gift to the gardener. No pests, no staking required, lovely as a cut flower....the attributes will astound you. Good for dry shade as well.
Soft blue, delicate trumpets. Between my Brunneras and Amsonia, I am happy.
One of the best features as well, is autumn colour.