It has fragrant, deep blue-purple flowers backed by silver-gray foliage. It has an airy texture and can be cut back in spring to encourage density. It creates a wonderful border for perennial beds ...

Blue flowers can be particularly prized in summer, where their cool nature contrasts with summer heat (if we are lucky).

This "mother" of the color-centric English perennial border often utilized soft grays ... Fuzzy gray foliage. Purple or blue flowers repeat bloom with rainfall. Many varieties to blend for ...