Actually, I was looking at it today, and it does have a number of
branches.
I know that last summer the leaves had a sort of white film on them, so I
was thinking of using an anti-dessicant spray on it this spring. I will
also
check the soil pH.

Obviously the age of this lilac shouldn't be keeping it from blooming.
Hopefully I'll have some success this season.

I wouldn't worry about the white film -- it was kind of powdery right?

James