These bones of a foundation planting provide structure to the flowering specimens around them. Slow-growing, dwarf, or compact varieties are a smart choice, especially under windows.
Rhododendron is a favorite for showy spring flowers and glossy green leaves; shorter varieties require less maintenance pruning to stay in check. 'Yaku Prince' blooms with funnel-shaped pink flowers and grows to 3 feet high and wide with olive-green leaves; Zones 4 to 8. Azalea 'Delaware Valley White,' a subspecies, has tubular white flowers and gets about a foot bigger; USDA Hardiness Zones
5 to 8.