Question: I have several ligustrum shrubs that I am trying to grow into a hedge. I've had these for almost a year and a half and they are sparse and not doing too well (I thought ligustrum grew quickly). I've noticed they all have brown spots on quite a few of the leaves- I've been spraying with an insecticidal spray every 14 days for the past month. What am I doing wrong? Thank you for any help.
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