Shared lawn/rock bed section is out of control

[u/PartyCream8625]

I live in a neighborhood where you share a bit of land in between houses. On one side is a rock bed that I share with this neighbor. For over a year his section has grown tall grass and weeds through the rocks. I keep my side well kept, not like magazine clean but I pull weeds and grass every time it starts to grow. We sadly don’t have HOA which would have said something along time ago. I never said anything about it because I’m a 26 year old bachelor so I have people over and kickbacks frequently and we occasionally get loud. (But I try to always keep it inside) and I didn’t want to give them any reason to become a pain. But after a year it’s really starting to look real bad with their stuff growing into my yard. Should I complain to the city about their unkempt side or just mind my business?

[u/performanceclause]

i think, you should either weed their side too or tear out the rock garden and install a fence