Two large glass sliders look into this from kitchen. I know nothing about gardening. The wire fence is 5ft. There is a little gap between wall and wire. Would bamboo work here and how easy keep is it?
First consider site aspects. The existing hedge is doing a reasonable job. The issue is what to do with the garden space.
Starting with Assessment, more on Garden design here: https://gardenie.wpengine.com/gerrycategory/successful-design/?id=5496