EDIT 5/9/18: I trimmed most of the grass and weeds around the cistern garden. I still have a bit of the edge to finish, a lot more to do inside it.
EDIT 5/9/18: I finished trimming around the septic garden. Next I will need to weed it.
EDIT 5/9/18: I cut the burdock out of the septic garden and removed some other weeds. There's more left to do, but at least now I can see the garden. Quite a lot has returned from last year! There are pink chives, wild chives, rhubarb, at least one of the carnations, sedum, sweet mint, chocolate mint, and lamb's ear. :D