Garden plants: Get a Clematis Montana Mayleen hardy perennial plant. Fast growing: It could almost be known as the 'mile-a-minute' clematis, such is the rapid growth of this variety. Super smelling flower: This variety is the best scented Clematis montana too, with delightful satin-pink ruffled blooms. Climber plant: If you want a quick-growing handsome climber, look no further! Upgrade option: Or treat your garden to two or three plants! Maximum size: Height: 10m (33'). Spread: 3m (10'). Clematis Montana Mayleen Hardy Perennial | Living Social