I have 10 Bridalwreath or Snowmound spirea bushes planted in a hedgerow along my side walk. As they stand right now they are each about 5' tall and about 5' wide. They just finished blooming and they looked fantastic :), long weepy white flower clusters that give the apearance that about 6" of snow just fell on them. last year I pruned them like you would a Boxwood, just shaping them into a round hedge. I've been reading up on the correct way of pruning them, taking about 1/3 of the old growth away. Has anyone out there have these types of bushes and if so help me out with a good pruning method for them because people stop to tell me all the time when they are in bloom just how good they look. (Or maybe they just want to talk to me, ;).... LOL!) I think I can do better with them next year if I prune the correctly now. Any help?