PlantFiles Pictures: Scotch Broom 'Moonlight' (Cytisus scoparius) by asturnut
Low-Maintenance Perennials for the Northeast
Soapwort - Saponaria officinalis A cinch to grow. Features clusters of phlox-like pink, purple, or white flowers in summer and fall. Full sun and well-drained soil. To 2 feet tall and wide. Grow with Yarrow; both are low-care, sun-loving perennials.
Licerne Blue-Eyed Grass, Dianthus, and Knockout Rose
Image result for shrubs zone 5 purple
Wheat Celosia has graceful waves of rose-pink flowers shading to silver at the base.
New Shrubs - Purple Haze Lo & Behold® Butterflybush – Fragrant purple-blue flowers from mid-summer to frost. Non-invasive. Attractive to butterflies and hummingbirds, but not to deer.