herbaceous plants caryopteris dark knight called bluebeards shrub with blue flowers in the garden

agriculture aromatic autumn bee blooming blossom blossoming blue bluebeard bluebeards borders botanic botanical botany called caryopteris colorful dark flora floral flower flowers for fragrant friendly garden gardening green herbaceous honey insect knight mediterranean mist natural nature ornamental outdoors perennial places plant plants shrub spirea summer sunny violet