Both the leaves and flowers can be ingested and are used raw in salads and stir fries. The flower petals are used in tea and other beverages. The flowers are harvested once they have folded and are then steeped in hot water or blended with lime juice and sugar for a delicious beverage. The tart leaves and blooms of cranberry hibiscus plants contain antioxidants, calcium, iron and vitamins B2, B3 and C.Cranberry hibiscus favors full sun but will grow in light shade, albeit a bit leggy. It grows in a variety of soil types but does best in well-draining soil.