‘Sweet Summer Love’ clematis unfurls flowers all summer long that exude a sweet fragrance. On hot humid days, the scent hangs in the air. Blossom open a cranberry hue and shift to purple as they age. Best of all, ‘Sweet Summer Love’ won’t invade your garden with unwanted seedlings (like its cousin, sweet autumn clematis). Vines grow 10 to 15 feet tall and 6 to 10 feet wide—a great choice for an entry arch or pergola over a patio. Hardy in Zones 4-9.