I admire you drawing a plan before beginning your potager.
I love the design.
I don't see the hexagon. That really needs to be a permanent structure in your potager, me thinks.
What does that mean?
In her Potager last year, there was a hexagon-shaped bed. It was unique and beautiful.
I love the new design, but think she ought to include the 6-sided growing bed again.
Strangely enough, when I was looking through one of my gardening catalogs last night I found a hexagon shaped raised bed and wondered if that's what you were talking about.
Here is a link that might be useful: hexagonal raised bed