@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. 🌱
When you have time enough, @SheriGR, you should try to play the 'Secret Society' options. Really funny; especially if you like having your house invaded by Sims in long robes. 😉
The fact that you get the message 'Something in your bones tells you to leave this plant alone' @LeandraCearley has everything to do with the secrets of the already mentioned society and refers to the mushrooms in the circle. That is also why the option to harvest them is greyed out. The other plants in the vicinity need caring, like watering and weeding and can be used in the rituals of aforementioned society.
Have fun playing.
