great post and nice looking herb spiral (was that yours?). We built an herb spiral last year and didn't water it. We had some periods without rain so it was interesting to see what thrived where and what didn't. Surprisingly, the "drought tolerant" rosemary died at the apex! one sheltered a bit by a sage plant thrived. Love the concept of microclimates and also its function, and being able to bend over and pick from a little microterrace herbs all together that i may want to eat at any given time. Saves space for us, for sure!
Not mine sadly :( have build one (a bit more stout) in a community garden, really need to work on one on our land. Hopefully within this next year when I find the time to go back!