I have several Lacy Blue Hydrangeas and have had them for years. Hydrangeas need to be cut back every couple years or they don't do well. The stalks get dried and brittle and the leaves tend to go brown on the edges. If they get growth of a foot or more in one year it kinda stresses them out. This year I cut them all back, they came back fine but no blooms in the year they get cut back. Hydrangeas love damp wet soil (Hydra) not acidic though. Hope that helps.
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