Annual and perennial flowers provide the garden and landscape with seasonal variety and bright and bold accents. When planted in every season, the landscape remains in color year-round and creates an attractive landscape design. Grown in a wide range of shapes, sizes and colors, flowers are a garden staple and help to provide a non-stop display of blooms from winter to fall.
Hellebore (Helleborus × hybridus cvs.) blooms in midwinter when most of the landscape is colorless. It grows 1 to 3 feet tall and wide and has a clumping growth rate. The nodding-like, frost-tolerant flowers of hellebore grow in a wide range of colors, including, green, white, pink, purple and yellow. The leather-like, deep green leaves of the hellebore are evergreen, meaning they retain their color year-round, an added benefit to the garden. Hellebore is a versatile winter plant and is both tolerant of heat and humidity. They grow best in full to part shade and well-drained, nutrient-rich soil that is neutral to alkaline. Plant hellebore in USDA zones 4 to 9.
Tulip ‘Calypso’ (Tulipa greigii 'Calypso') is a spring-blooming perennial flower that has a moderate growth rate. It grows in small clumps and reaches 6 to 12 inches in height. The large orange and red flowerheads of tulip ‘Calypso’ are edged in primrose and have a black base, an unusual color pattern to a tulip. The dramatic, stippled foliage is variegated with pale green and deep purple for a lush and striking display to the garden. Tulip ‘Calypso’ emerges in early spring to last through the season. Versatile, it is frost-tolerant to withstand an unexpected drop in temperature within the garden. Tulip ‘Calypso’ grows best in full sun to part shade and well-drained, fertile soil. They are suitable grown in USDA zones 3 to 8.
Blanket flower (Gaillardia pulchella) is a summer-blooming, annual flower that has a moderate growth rate and clumping habit. It grows 18 to 24 inches tall and 10 to 12 inches wide. The red to orange daisy-like flowers are edged with yellow and have a deep crimson to purple center that attracts butterflies and birds. Providing bright bursts of color all summer long, blanket flowers also make an ideal fresh cut flower. They have a high drought tolerance and grow best in full sun and well-drained, fertile soil. Blanket flowers grow in all USDA zones.
October skies aster (Aster oblongifolius 'October Skies') is a perennial flower that blooms in fall. They grow 1 to 3 feet tall and have a spreading growth habit. The masses of daisy-like blooms on October skies aster are dark sky blue, hence the name, and attract butterflies to the plant. They are both deer- and frost-tolerant, creating a hardy fall flower. October skies aster grows best in full sun to part shade and well-drained soil. They are suitable for growing in USDA zones 4 to 8.