I apologize for this delayed reply to your gardening question and hope it is still helpful to you. That low height limits the options quite a bit. If the area is sunny I don't know of any shrubs that are evergreen and bloom and stay that short. In shade the dwarf Pieris variety called 'Prelude' would be an option.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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