I'm impressed!!!!
My suggestions are driven by what I like aesthetically. At our home, we tried to create a "children's" edible garden with wandering paths and such -- all on a very, very small scale (but the idea is there...sort of). So, that is where I come from when I looked at your schematic. Here are my thoughts:
1. I like serpentine walking paths among the raised garden beds, but that might mess with the placement of your arch. I love meandering around our beds, but some people might prefer straightforward garden beds.
2. I have attached a few photos of The Lost Gardens of Heligan from our trip to Cornwall/Devon last month. How they integrate edible garden beds with traditional English garden design was so beautiful. The apple tree arches were unbelievable. Your arch in the raised beds section reminded me of this. Would be stunning!
3. Do you like to do container gardens? I would do a few herb pots or some other containers on your deck.
4. As I noted above, we have a serpentine flow to our garden beds, but I like to mix edibles with flowering plants. Our raised beds are surrounded by beds of perennial flowering herb plants, like lavender, coneflower, and witch hazel. The flowers attract so many birds, butterflies, and bees, and we use the herbs to make tea and infusions. We love it.
5. What about doing some bean teepees? Do you like pears? An espalier would be pretty along a fenceline if you have a privacy fence.
6. Do you have a table on the deck?
7. I like to get away from squares and rectangles. For example, our front lawn is a circle with garden beds surrounding the circle. It is really unique and lends itself nicely to walking around the beds. If you like the idea of getting away from block design, think about triangles, squares that have an X walking path through them, circles, etc. One of the pics from the Heligan gardens illustrates this.
8. Think about focal points. If you are sitting at the deck, where do you want your eye to go?
Apple tree arches:

I love gardens with paths for wandering:


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