Re: "Something in your bones tells you to leave this plant alone"
@LeandraCearley I can reproduce the message if I wait a day on campus and go back over at about 5/5:30 am. In my case then the Chrysanthemum with the mushrooms 'circle' gave me that "Something in your bones tells you to leave this plant alone" message, I cannot, however, see any message whatsoever about the mushrooms. Those mushrooms look different from the harvestable ones in the game. Did I misunderstand or were you not speaking of seeing the message when hovering over mushrooms? When I hover over mushrooms there I only see a 🚫.
I did have my sim plant and harvest on a lot in the town, so I'm guessing it has to do with some dynamic specific to this area in the town. This mushroom circle has a few harvestable plants, the mushrooms, and a stone 'alter' in the center. This is where the 'Secret Society' meets (more information about the Secret Society is in this article). https://sims-online.com/joining-secret-society-sims-4-discover-university/ I haven't played 'Secret Society' stuff but it sounds like they use crystals, harvestables, and metals for sacrifices, plus they tend that 'garden'. Thanks, @CGrant56.
If you would like your sim to be able to harvest plants you could grow some on their lot if they are in a home or in a planter if they're in the dorm. 🌱