As the blazing sun and high temperatures of August penetrates the garden, many white flowers emerge to light up the space. White summer-blooming flowers complement "hot" flower colors like crimson, orange and yellow. They balance out perennial beds, containers and walkways with a subtle design. Grown in a wide range of shapes, sizes and textures, white blooms create a showy garden display.
Oriental lily (Lilium 'Casa Blanca'), also referred to as 'Casa Blanca', is an August-blooming perennial flower with large, white blooms. Growing 1 to 3 feet tall and wide, oriental lily flowers have a clumping habit and moderate growth rate. Oriental lilies are extremely fragrant blooms that are striking tucked along a garden bed. The strong, bright green stems hold up pure white flowers that also make ideal fresh cut blooms. Versatile, they can be grown in any garden soil just as long as their flowerhead receives full sun and their feet a smattering of shade. Fine Gardening says to plant them among shrubs or other plants so that the base of the stem is shaded and the head will be in the sun. Oriental lilies require a deep planting and regular fertilizer. Plant oriental lilies in U.S. Department of Agriculture (USDA) hardiness zones 4 to 9.
Flat-Topped White Aster
Flat-topped white aster (Aster umbellatus) is a perennial flower found growing along moist fields and thickets. Growing 2 to 8 feet tall, flat-topped white asters are ideal perennial flowers to plant in the back of the bed for height. The white blooms of flat-topped white asters grow up to 3/4 inch with a flat clustering form and 10 to 15 white petals per bloom. The lance- or elliptical-shaped leaves grow up to 6 inches long to taper at the ends. Flat-topped white aster flowers attract butterflies and require full sun and a moderate amount of moisture to thrive. Plant in USDA zones 3 to 8.
White coneflowers (Echinacea purpurea 'White Swan') are a perennial flower with a moderate growth rate and white daisy-like flowers. The central cones are copper to green and surrounded by the white petals that grow up to 4 1/2 inches wide. Emerging in early summer to last into fall, white coneflowers create a mass of bright blooms. Growing 1 to 3 feet tall and wide, white coneflowers are ideal grown in a cutting garden for fresh cut flowers but also bring birds and butterflies to the garden. To promote flowering, deadhead spent blooms as soon as they are visible. White coneflowers are drought- and heat-tolerant, creating a versatile and hardy perennial variety. They require full sun to part shade and well-drained soil. Plant in USDA zones 3 to 9.