Loved by generations of gardeners, peonies are treasured for their fragrant, fluffy flowers in late spring to early summer. As cut flowers, they're eye-catching and elegant. Herbaceous and tree peonies also have very attractive, ornamental foliage that provides months of interest in the garden. Peonies are versatile, sun-loving perennials, and peony bushes can be planted as accent plants or grouped together to line a walkway, form a low-growing, flowering hedge or as a foundation planting. Peonies are long-lived perennials, and deer tend to pass them buy. Some factors to consider when buying peonies for sale online are their bloom time, flower color, mature height and spread, and hardiness zone.