Planting in between the sidewalk and street. Allium giganteum (Allium 'Globemaster'), steppe sage (Salvia memorosa 'Caradonna'), catmint (Nepeta x faassenii 'Walkers Low') and peat reed grass (Calamagrostis x acutiflora 'Karl Foerster').
country garden - SFH adds: I had to pin this wonderful site on three different boards it is such a great example of a successful border, winning plant combinations, and Blue/Purple- crown jewels in the garden. - My Cottage Garden
Astilbe : this perennial is a great shade plant with dense foliage + feathery, summer blooms for a shade garden. Plants grow to as much as 5 feet. There is a dwarf variety that grows about Pairs well with hydrangeas, hostas, & ferns.
Golden Japanese Forest Grass - I really cannot get over Japanese Forest Grass (Hakonechloa macra 'Aureola', zones 5 to My favorite is the variegated variety. I planted mine under a Japanese maple, and the contrast was genius and it has so much movement.