This is Hibiscus syriacus Snow Drift, also known as White Rose of Sharon, and Shrub Althea. Hibiscus syriacus Snowdrift can grow up to about 10 feet tall and likes to live in the sun or partial shade. These gorgeous blossoms show up in the middle of the Summer and stick around until early Fall. The flowers, leaves and roots are edible and are normally found in salads or used as vegetables. The leaves can also be dried and used to make a tea. The younger the leaves and flowers the more tender they are. The roots are fibrous and lacking much flavor, but if you know how to season things it can be delicious. Hibiscus plants in general are a nectar source for the Cloudless Sulphur, Orbed Sulphur, Disguised Scrub-Hairstreak, Yojoa Scrub-Hairstreak, Dukes Skipper, Large Orange Sulphur, White Angled-Sulphur, Yellow Angled-Sulphur, and Monk butterflies, and larval hosts for the Bumelia Webworm and Pearly Wood-nymph moths, and the Cloudless Sulphur butterfly. USDA Hardiness Zones 5 to 8.