mine are leafing out and at least one of the varieties is starting to set flower buds. but they could be in a warmer microclimate than yours; I wouldn't give up hope yet.

I live out in the country where everything comes out of dormancy much later than stuff in town. I have alot of viburnams and they all seem to leaf out at varying times but most of mine now have leaf buds or the leaf buds have opened up.

If you're doubting that your's made it through the winter...just leave it alone for a couple more weeks and see what happens.

I have of all things, a Red Bud tree that every year surprises me if it makes it through the winter. It is always the last thing in my yard to set leaf buds. It just has them now, this week so yay!