Answer: Syringa, or lilac bush, can take several years to become established before it will grace you with flowers. I think it's worth the wait, though! Lilacs grow best in full sunshine and flower best where they receive a pronounced winter chill. You didn't list your hometown so I don't know whether or not it's getting the required cold winter weather. Just be patient with your lilac. It should flower within the next 2-3 years.
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