Clematis has a reputation as a picky vine to grow, and it can be. But Clematis Montana or Armandii are in a class by themselves. Easy to grow, vigorous spring bloomers, they are fragrant and evergreen to semi-evergreen. Rugged and breathtaking in bloom, they are loved by butterflies. Don’t prune this one unless you have dead wood. If you do need to prune, do it right after flowering, as they bloom on old growth.