How do you get a lilac to produce more flowers?

It%26#039;s about five years old, and has only bloomed the last couple of years. At that, it only produces about 15 flowers..If I cut it back when the flowers die, will that encourage more flowers for the next year?

How do you get a lilac to produce more flowers?
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http://www.gardenersnet.com/lilac/lilac0...
Reply:Lilacs will not bloom when they are not getting enough sun. I placed one in filtered shade and it did not do anything until the neighbors cut down a tree and more light reached it - by then it was pretty large to move but it now blooms on the tips that get more sun. So I bought a new small one and placed it farther out away from the oaks and it blooms just fine now - trim back some of the shade or move it to sunnier quarters. They will also not bloom if they get too much fertilizer, if they are planted too deeply (you can try pulling some soil back from the base if the other problems do not see to apply) and they will not bloom the following year if you cut them hard or cut them in late summer or later. One of these is probably the problem.



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