In Japan, you must not bring “Yuri” (ゆり, lily flowers) to hospitals.
Lilies are unsuitable for small hospital rooms because they have a strong scent. They also bloom downwards, which remind Japanese people of death. Although it all depends on the condition and circumstances of the patient, it is generally sensible to avoid giving lilies as gifts.
It is a case by case. Generally, we decorate flowers on funeral home, grave, altar. In some cases, the deceased place (accidental death etc). Decorating flowers on the desk of a deceased student has the meaning of another students’ education.