Lilac (Syringa vulgaris), hardy in USDA zones 3 through 7, is a low-maintenance choice for the spring garden in western New York. Flower colors range from white, through pinks, blue purples and purples. A new reblooming cultivar, Bloomerang (Syringa "Penda" Bloomerang), hardy in USDA zones 4 through 7, is suitable for smaller gardens at only 3 to 4 feet tall. Another fragrant shrub, slender deutzia (Deutzia gracilis), hardy in USDA zones 5 through 8, blooms in April or May, with tiny, fragrant white flowers. Both lilac and deutzia require only light pruning after blooms fade.
Gold-leafed cultivars of Japanese false cypress (Chamaecyparis pisifera), hardy in USDA zones 5 through 7, provide four seasons of interest in sun or part shade and require almost no maintenance. At 3 to 5 feet tall, it is a good choice for small or larger garden settings in western New York. Mountain laurel (Kalmia latifolia) is a broadleaf evergreen that is hardy in USDA zones 4 through 9 and is relatively unattractive to deer and rabbits. Reaching 5 to 15 feet tall, it bears white or pink, rounded blooms in May and needs little maintenance beyond occasional pruning.
Hardy in USDA zones 3 through 8, deciduous Japanese spirea (Spirea japonica) combines the benefits of easy care with pink flowerheads in early summer. It reaches 4 to 6 feet tall and can be used as a specimen shrub or as part of a foundation planting. The climate in western New York is also amenable to native oak leaf hydrangea (Hydrangea quercifolia), hardy in USDA zones 5 through 9. The shrub bears large flower panicles that age from white to pink. The plant needs little maintenance other than occasional pruning after the flowers fade.
Hardy in western New York and USDA zones 5 through 9, blue mist shrub (Caryopteris x clandonensis) provides clouds of butterfly-friendly blue flowers in late summer and early fall. At 2 to 4 feet tall, the plant boasts aromatic leaves and requires little maintenance. Rose of Sharon (Hibiscus syriacus) is a low-maintenance plant, hardy in USDA zones 5 through 8. It features hollyhock-like flowers in shades ranging from white to blue-purple. Rose of Sharon can also be grown as small trees, reaching 8 to 12 feet tall. Prune hard after flowering to keep the plants bushy and blooming.