Jenn,
I looked up some info on that bush, Viburnum Plicatum, and you are in the right
zone and sunlight requirement. However, it states
not to do any pruning until after it
flowers, which starts in May. Also, check the fert. you have been using and let us know the analysis (10-15-10,etc..)It may be a combination of several factors such as that it was too young to
flower the past couple of years and now it is ready to
flower except that you pruned the
plant too early and cut off the ends that would have flowered this year. You may also be feeding the wrong type of fert. and are encouraging
plant growth rather than
flower production. Make sure to use a high phosphate fert. and dont prune until after May of next year if at all and see what happens...