Perennial plants grow and produce flowers for several years after being planted. In the fall, the top of the plants will die while the root system will stay alive through the winter season, according to the North Carolina State University website. Unlike annuals, perennials do not have to be planted every year, which is a benefit to many gardeners.
The Bleeding Heart (Dicentra spectabilis) is characterised by its unique pink or white heart-shaped flowers that bloom in late spring to early summer. It also produces green fernlike foliage. At maturity, the plant will reach two to three feet in height. According to the University of Illinois website, bleeding hearts prefer moist, well-drained soil and grow best in partial to full shade.
Russian Sage (Perovskia atriplicifolia) is a perennial flowering plant that will reach 2 to 3 feet in height at maturity. It prefers full sun and dry soil. The plant has silver-grey foliage and produces light blue or lavender flowers from July to September. Russian sage is generally a low-maintenance plant that is tolerant to drought, according to the University of Illinois website.
Native to Europe, the shasta daisy (Chrysanthemum maximum) is now naturalised throughout the United States. It is a hardy perennial that will reach 1 to 3 feet tall at maturity. From June to July it will produce white flowers with golden yellow centres, according to the Texas of A&M University Department of Horticultural Sciences website. The shasta daisy is often used as ground cover or as a border plant.
Native to the eastern region of the United States, the black-eyed Susan (Rudbeckia hirta) is often considered one of the most common American wildflowers, according to the Texas of A&M University Department of Horticultural Sciences website. It is characterised by its bright yellow flowers with brown centres that bloom from June to August. The plant grows best in moist soils with full sunlight. At maturity, it will reach about 2 to 3 feet tall.
The peony (Paeonia) produces dark green foliage and fragrant flowers. The flowers typically bloom in early June. According to the Colorado State University website, peonies come in a variety of colours, including white, pink, maroon, red and yellow. At maturity, the plant will reach 3 to 4 feet in height. Peonies prefer full sun to light shade and thrive best in well-drained soils.
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