Rip BD
I tend to float around a bit. If I stay here for another season then I will rebuild with raised beds over 1/2 mesh over 6" of gravel. I want to space my plants out way more, so that they never shade each other. I originally thought that since my native dirt is so good, the rots would continue stretching as much as they need. I know realize that I would benefit from better drainage.
I think youre right on the money with the sand, gravel, and buried radiant heating idea. I think it could also double as a radiant cooling system if you buried a water tank for summer.
That gopher got you good.. Did you use anything to protect the plants? We used 1/4" hardware cloth under all our baskets and so far no issues, but i can see them chewing up the hillside next to the plants.
When you pull that plant are you gonna replace it with something?