[JustaDumbBlonde]

I wouldn't recommend putting anything on the lilacs until you get some idea of what's going on. Get an inexpensive soil test kit at a garden center, or better yet, get a sample kit from your local extension office and send off the test. I suspect it is a nutrient problem, but I couldn't begin to know which one.

You might also do a search engine query on how to fertilize a lilac. That will give you a formulation that is recommended to get the best results.

[momtothree]

I will do just that. My neighbor’s Lilac (right next door) doesn’t bloom either. A close friend who lives two streets away... no luck on hers. I keep thinking alone your lines... it is something in the soil (especially since the one use to bloom). Something has changed... the soil test may tell me what. Thanks!