How do I love thee, let me count the ways. Beautiful Clethra, also known as Summersweet. Clethra alnifolia is a shrub that always lives up to its name. This landscape darling will reward you with an abundance of sweetly scented flowers that also does double-duty as a pollinator magnet. Adds interest to the landscape in the Fall when the leaves turn a striking golden yellow. Typically grows 3 to 8 feet tall and 4 to 6 feet wide, with the exception of dwarf varieties. Blooms often last for weeks. Full sun to part shade.