This planting combination is a summer color extravaganza: orbs of purple allium; simple pink rosettes of Rosa glauca float above purplish-blue foliage, and the deep blue blooms of Geranium x manificum are indeed magnificent, albeit not as long-blooming as the ever popular G. 'Rozanne' whose flowers that are less vibrant and showy. If a longer flowering period is a top priority, sub in Rozanne. The barberry in the pictured vignette is likely a larger variety than the Berberis thunbergii 'Concorde' we're suggesting. There are a number of commonly grown dark-colored barberries that could work, though they'd be positioned differently in the overall scene depending upon size. Concord is a dwarf variety, and a small group of them would be suitable toward the front of the bed. This planting combination peters out by mid to late summer flower-wise, though the Rosa glauca, decorated with reddish-orange hips remains interesting well into late fall.
Exposure: Full Sun
Water Needs: Average
Features: Varied Foliage, Texture, and Form, Flower Fest, Attracts Pollinator, Romantic Cool Colors
Focus: Color Theme
Seasons of Interest: Spring, Summer, Fall, Pleasing Seasonal Changes
Maintenance Level: medium