Answer: Sounds like your lilac may need some fertilizer to get it back into shape. Generally, lilacs prefer rich, well-drained soil that's slightly alkaline, full sunshine, and, to bloom well they need a pronounced cold spell in the winter. If your winter weather was on the mild side, that may explain the lack of blooms. Fertilize with a quarter-pound of 12-8-8, sprinkled over the root area of the plant and watered in, or spread a 3-4 inch thick layer of compost over the root area. This should help with leaf formation. You might also want to prune lightly, to encourage new stems and leaves.
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