Korean Lilac Didn't Bloom This Year - Knowledgebase Question

Brecksville, OH
Question by amaggiore
May 25, 2001
We have two 3' tall korean lilac bushes that bloomed beautifully last year and are not blooming this year. This also happened the year after we planted them for the first time. It seems like they only bloom every other year...


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Answer from NGA
May 25, 2001

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This isn't uncommon for young lilacs. Until a lilac is well established (7 - 10 years), it's advisable to remove the spent flowers from the shoots. This helps the plant to set new flower buds for the coming year. It's best to do this as soon as the shrub is done blooming so the plant has plenty of time to develop flower buds. Some gardeners find this problem is a result of overfertilization. If your lilac is in a lawn where you apply regular doses of nitrogen, this can inhibit flower formation. Lilacs need very little supplemental fertilizer. A rich compost mulch applied in spring is the most all lilacs need to thrive. I hope this helps!

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