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I would like to prune my lilac bush. What is the best time of year to do so and how much can be cut back and not harm the bush?
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Lilacs are spring flowering shrubs and the best time to prune spring flowering shrubs is after bloom, late spring early summer is best to establish new wood for next spring blooms. Lilacs generally produce more blooms on healthy, newer growth, rather than on older stems.
Here is a link to a 5 minute video with general tips for pruning shrubs from Utah State University Extension "How to Prune Shrubs" click on the following link or cut and paste into your web browser http://extension.usu.edu/htm/news/articleID=3470
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