Best Treatment for Old Lilacs with blight - Ask Extension
Is it best to prune all the way to the ground and start fresh? Or treat with copper spray next spring? Both?
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Best Treatment for Old Lilacs with blight #878946
Asked July 26, 2024, 5:00 PM EDT
Is it best to prune all the way to the ground and start fresh? Or treat with copper spray next spring? Both?
Washington County Minnesota
Expert Response
Thank you for reaching out to ask2.extension.
The problem with trimming back older bushes to the ground is the possibility they will stress too much.
I think I’d wait to spray in spring. Please follow label instructions. Be aware that they may not pull through.
