Shade garden - 'Midnight' lobelia, 'Silver Mound' artemesia, heuchera, trailing purple sweet potato vine, 'Mona Lavender' plectranthus in the window boxes helped tie the purples and blues into the back of the bed.
Dalmation Bellflower produces beautiful mounds of purple bell-shaped flowers from late spring through summer. Low-growing plant is perfect for adding color in front of other perennials. Grows only tall. Spreads Prefers full sun to partial shade.
combo: Actaea simplex ‘Hillside Black Beauty’ (aka Cimicifuga), Heuchera ‘Palace Purple’ play beautifully with the chartreuse-blades of Hakonechloa macra ‘All Gold’ and to the far left, silvery, variegated Lamium maculatum ‘White Nancy’
RIVER OF FOLIAGE -- Lining a rustic woodland path with mixed hosta borders creates two flowing ribbons of color and texture, with hues from chartreuse to green to blue and foliage that ranges from wide and flat to narrow and ruffled along the edges.
Buxus microphylla japonica Japanese boxwood another example of a beautiful shade garden, flowers, Heuchera
Give your sidewalk garden an extra bit of pizzazz with flowing curves: http://www.bhg.com/gardening/landscaping-projects/landscape-basics/sidewalk-garden-front-yard/?socsrc=bhgpin02082014createinterestwithcurves&page=2
Plan for repetition. Too many individual plants can be as overwhelming as too many colors. Using the same plant throughout the space creates a sense of rhythm. Chose one to three plants that you can use throughout the flower bed to achieve this effect.