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No Blooms on Lilacs

"I have not had any blooms on my common lilacs for the past 3 years. They bloomed the first year they were planted. It is not a pruning issue, I was wondering if they need some kind of soil additive."
Submitted by BHGPhotoContest

Lilacs generally don't bloom for one of two reasons. They are either getting too much shade. They need at least 8 hours of direct sun a day. Or, they are being pruned at the incorrect time. They should only be pruned right after they flower, in late spring. Also, don't feed them too much. Fertilizer will promote lots of green growth, but few flowers."

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