That's very unique and cool, the hanging of items from a tree sounds very spiritual and personal, to surround yourself with familiar items.
I remember when I was in Amsterdam about 14 years ago. Literally the first coffee shop I walked into after arriving. There was a poster of Lee Scratch on the wall with gig dates. It had the night befores date on it. I asked the dude there did I just miss him? And he was like yeah man, he played here last night. He comes over a couple of times a year and he was here. Pipes, bongs, chillums. You would of had a smoke with him if you were a day earlier. 😳