How much sun is it getting? Viburnums need 4-6 hours of sun daily. If you
have it in a very shady spot this may be the problem. Another problem may be
that the flower buds are drying out over the winter. Is it in a very windy
area? We did have a pretty nasty winter which affected alot of plants that
arent bothered by a normal winter. Later on in the summer go out and see if
there are flower buds on the plant.

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