I used to play UO, caring for my plants was something I (and the wife) really enjoyed in that game. You could cross-pollinate to gain seeds for other rare plants. Can’t remember exactly how the system worked (I’m sure I could google it if I really needed to know). I’m not suggesting you should copy that though.
It’s an idea, anyhow… I won't go into more details ‘cause I’m sure you geniuses can figure out something cool
