At my workplace we have what I think are calla lilies in big pots. They are right between the door from outside and the door to inside entryway. These plants are not surviving at all and I'm wondering if there is a specific reason as to why they are dying, or the best way to help them thrive. Maybe cutting the calla lily down to the soil? Or just keep watering and hoping for the best? Also, when deadheading a calla lily, where do I clip off the leaf for best results? Thanks for all your help!