Bush appears healthy and much larger than last year. It has full sun in fairly rich soil. It is about seven feet tall and I have not fertilized it.
Lilac Bush Did Not Bloom This Year
Certified GKH Gardening Expert
There could be a few reasons for your lilac not blooming.
My best guess would be it does need a rejuvenation prune. I did this very prune to our lilac when we moved to our home. The lilac was only producing a few flowers. A good prune and 2 years brought a tree full of fragrant blossoms.