The sweetshrub (Calycanthus floridus), also sometimes called Carolina allspice and spicebush, has unique flowers with a smell that's often compared to a mix of strawberries and tropical fruit. Best of ...

Summersweet (Clethra alnifolia) blooms in the late summer, says Irish-Hanson, but it's wise to plant it during the spring. "The fragrance is sweet with a hint of spice," she adds. "Its white ...