With out flowers to narrow down, I’m speculating it could be some type of ornamental grasses or a type of African iris (Dietes). Both of the mentioned plants are low maintenance and easy to grow without much help from you. For now check out images of Dietes from link below. Post again when the plants bloom, if you still don’t know by then. Best wishes! https://www.google.com/search?q=dietes&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwifyK-BhYjPAhVJWSYKHW2yC1MQiR4IggE&biw=1920&bih=909#tbm=isch&tbs=rimg%3ACSliiokS428xIjjG01K_1ZvOb-V9vsJKafYi1VetSHYBtH0tLvjpXmIuBKruVAxghHksaGoZxYcleLPZwhufmMAijGyoSCcbTUr9m85v5EQ8PS1SAVpftKhIJX2-wkpp9iLURypDRh_1k8x08qEglV61IdgG0fSxFr_1Eu83kig0SoSCUu-OleYi4EqEYpgDaR6kgd_1KhIJu5UDGCEeSxoR0FCG7OJuwGEqEgkahnFhyV4s9hHO7oIbHArYfyoSCXCG5-YwCKMbEY0Jkj-X-wcc&q=dietes&imgrc=S1qrzCdoWsacOM%3A