Many flowering plants are long past blooming as summer winds down and fall looms on the calendar. However, varied species of plants do not bloom until the ninth month or continue blooming well into September, giving you landscaping options that spice up your property with color to go along with the changing leaves. These September flowering plants include herbaceous perennials, shrubs and vines.
States with warm winters support the ice plant (Delosperma cooperi), a species from Africa that blooms from June into September. Suitable as ground cover because it grows only to 3 inches high, ice plant is an evergreen in southern climates that forms mats of vegetation. Ice plant's flowers resemble purple daisies. Ice plant requires dry soil and full sun exposure; growing it in areas with poor drainage doom its chances of survival.
Use woodbine (Clenatis virginiana) from USDA zones 3 through 8 for its autumn flowering effect, with September right in the midst of its blooming period. Woodbine is a deciduous vine, growing to 20 feet and able to serve as a climbing vine or as ground cover. Woodbine is a native to eastern North America and its flowers emerge beginning in August, lasting into October. The sweet-smelling flowers are pure white. Woodbine grows in sun or shade, but its ability to spread quickly is a habit you need to monitor.
Plant boneset (Eupatorium perfoliatum) in woodland gardens and in cottage gardens. This North American native, hardy from USDA zones 3 through 8, grows to between 4 and 6 feet, making it appropriate for wildflower borders. Boneset blooms from July into September, producing groupings of white flowers at the top of the plant. The stems and leaves are hairy. Boneset requires a damp area in which to grow, but does all right in both sun and shade. Boneset's flowers attract various butterflies and they are good specimens for dry flower collections.
Any lingering butterflies still around in September take advantage of the blooming of the Seven-son flower (Heptacodium miconiodes). The shrub, a native of China, is cold hardy as far north as U.S. Department of Agriculture plant hardiness zone 5. It blooms late in August and into September. The Seven-son flower produces clusters of white, aromatic flowers. This shrub grows to between 15 and 20 feet, sometime taking tree form. Another attractive aspect of Seven-son flower is its peeling bark, which is tan and comes off in strips.