The month of September is deemed late summer or early fall. This is the time when most gardens shed much of their colour. Spring-blooming flowers have ceased blossoming and summer flowers can also be done blooming. However, several perennial flowers provide the garden with colour .
Yellow Flowers
One perennial with masses of sunny yellow blossoms is your little lemon goldenrod (Solidago hybrida”Dansolitlem”), which produces feathery yellow flower clusters from late summer through early fall. This perennial reaches 12 to 18 inches tall and wide in U.S. Department of Agriculture plant hardiness zones 5 through 8. Butterflies are given a last meal prior to migration by flowers. Threadleaf coreopsis (Coreopsis verticillata) develops best in USDA zones 3 through 9, attaining 30 to 36 inches tall and 24 inches wide. Yellow ray petals lay flat out when completely open above leaves. This perennial starts blooming in June and continues until the end of September.
Copper Blossoms
“Autumn Joy” stonecrop (Sedum x”Autumn Joy”) grows well in USDA plant hardiness zones 4 through 11, attaining 18 to 24 inches tall and wide, and forming clumps of succulent leaves. In late summer through fall, flat clusters of pink flowers appear and flip age. Dark Triumph Chrysanthemum (Chrysanthemum”Dark Yotri” Dark Triumph) reaches 18 to 24 inches tall in USDA zones 5 through 9, with two-toned bronze-colored flowers appearing from September until the end of fall. Mardi Gras sneezeweed (Helenium”Helbro” Mardi Gras) creates copper-red ray petals with yellow markers enclosing a brownish cone-shaped centre. This 2- to 3-foot-tall perennial attracts butterflies into the garden from August until October.
Purple Flowers
One September-blooming purple blossom is your”Caradonna” meadow sage (Salvia nemorosa”Caradonna”), attaining 18 inches tall and spreading 24 inches wide in USDA zones 4 through 9. Spikes comprise of little blossoms appearing through fall. “Celeste” Michaelmas daisy (Aster”Celeste”), rising in USDA zones 4 through 8, reaches 24 to 30 inches tall, making purple beam petals surrounding a yellow centre from August through September. “Ozawa” ornamental onion (Allium thunbergii”Ozawa”) produces tufts of hollow grass-like leaves growing significantly less than 12 inches high with globe-like flowers comprising little purple blossoms.
Pink Blooms
Japanese anemones (Anemone hupehensis) grow well in USDA zones 4 through 8, attaining 18 to 24 inches high. Pink rampant blossoms with yellow centers develop until the end of September from August. The flowers are held above the leaves of branching stems. Musk mallow (Abelmoschus moschatus) grows best in full sun in USDA zones 9 through 11, with pink blooms and lighter-colored facilities. This perennial continues until the end of fall and begins blooming in June.