We used to have a service that would send someone to water the plants and replace the tall bristly ones on a regular basis before they started to look old. That service is gone.
Resulting challenge:
By the time we noticed the plant maintenance people hadn't come in a while, the plants in hanging pots were wilting and nearly dead. They were dropping yellow leaves all over the recycle bins and part of a study area. It was not a very attractive addition to the decor. (Message: "Come to the library and wither away while you study".)
Coping mechanism:
We were told we could just throw them out, but instead a colleague and I appointed ourselves Plant Caregivers and have been watering them once a week and trimming off the dead leaves.
Outcome:
After a few weeks, and a return of some healthy green color, I think they're gonna make it! Good old-fashioned plant-watering gumption saves the day.
For a while, at least. I don't know much about plants, so I have no idea of their natural lifespan. The tall bristly ones that used to be replaced every few months are the big question for me. Was there a reason to take them away every so often? Do they topple over dead at 6 months? Do they sprout odiferous blossoms? Grow flytrap maws and start snapping up the students?
Being as I'm a librarian, one would think I could do some research on the subject and attempt to locate answers to these questions, but that feels like work. Maybe I'd rather just twiddle my thumbs and wonder.