Many LA’s practice planning as a portion of their work. However, I hear much less of any public sector planners who also practice Landscape Architecture. I don’t have enough experience to consider my opinion credible as to why that seems to be the case, but I believe the understanding of “high design” as opposed to “conforming with the ordinances” is a large difference. However, that isn’t to suggest that every LA understands “high design” either. Take it for what you will.