Sweet Shrub - Calycanthus floridus - is an eastern U.S. native shrub with glossy, aromatic dark green foliage that reaches 6 to 9 feet in height. The flowers are a striking 2-inch fragrant, deep red to maroon color that last a month or more. Sweet Shrub is very resistant to disease and pest problem and is highly adaptable to many soil types and grows in sun or shade.