I had Yardzen plans drawn up a few years ago, am

now able to take on the project. Their edging product doesn't exist. What is a good composite to use here around the tree? I like a thicker edge for mowing. Someone suggested redwood bender board. Thoughts? Also, any ideas for a simple walkway (straight) design? My concrete guy said to not overdesign .. let the landscape do that for you. I like the broken steps, but there is a slight grade and not really possible here. I am doing the work myself. Would LOVE your input. Thanks!