African Cranberry Hibiscus. This fast growing bush is covered with beautiful dark red flowers several times a year. Leaves are edible, acidic, rich of vitamin C, good for teas and salads. Very similar to Hibiscus cannabinus but with dark red leaves. All parts of the plant are edible and can be used for delicious tea or in a salad. Very fast growing, forms a large bush in one season. Tolerates dry conditions. Grow your edible landscape in no time! With proper care and protection, this plant can provide a striking display of color and texture in the garden year after year. Learn more about edible hibiscus: Most useful Hibiscus plants.