Two types of hibiscus come in broadleaf evergreen form if you desire pink flowers. One is Japanese lantern (Hibiscus schizopetalus), growing to 8 feet high, while the Chinese hibiscus (Hibiscus rosa-sinensis) "Persimmon" matures to 10 feet. Both species survive outdoors in North America only in Zones 10 and 11, and also can be grown as container plants. Bring them indoors at the first inkling of frost and keep them there until any threat passes in the springtime. "Persimmon" blooms pink from June into September, with shiny green leaves. Japanese lanterns possess pink flowers with fringed petals curving upward as the flowers droops down from a branch.
USDA Zones 5 through 8 are appropriate for the rose of Sharon (Hibiscus syriacus) and its cultivars featuring pink flowers. "American Irene Scott " grows to 12 feet, tall enough to become a hedge or screen. It blooms soft pink flowers from July into October. "Lucy" is smaller at from 6 to 8 feet, blooming from June into October with pinkish-red flowers. "Aphrodite" grows between 6 to 10 feet high and has dark pink flowers. All three of these cultivars are deciduous shrubs.
"Pyranees Pink" is a perennial hibiscus known as a rosemallow, growing to 4 feet in full sun environs from Zones 5 through 9. It generates large flowers, described by the Missouri Botanical Garden as being like dinner plates -- up to 12 inches across. The pink flowers on this shrublike hibiscus bloom from July into September and the plant's ability to do well in wet areas is an added bonus. Hibiscus lasiocarpos is a perennial rosemallow hibiscus native to Southern states. Its flowers vary between white and rose-pink shades, with prodigious blooms as wide as 6 inches and lasting from July into October..
Cultivars of the hardy hibiscus (Hibiscus moscheutos) survive from USDA Zones 4 and 5 through Zone 9, with the cold tolerance depending upon the type. For Zone 4, try cultivars such as "Plum Crazy" and "Disco Pink Belle" for their pink flowers. "Scallopini," "Matterhorn" and "Etna Pink" grow from Zone 5 into the warmer zones. Hardy hibiscus grows small enough at between 2 to 8 feet to serve in mass plantings or in perennial borders. "Sweet Caroline" is a cultivar typical of these perennials, producing 6- to 8-inch-wide pink flowers starting in July and lasting until September.