How to keep this plant
I am new in NZ and absolutely know nothing of the plant's names and how to keep my new bought house's garden in good looking. I took a photo of a green plant and posted with this entry. Could anyone kindly tell me this plant's name; is it annual or perennials. If it is annual, must it be removed? If it is perennial, what is the right way to do with it?
Thank you very much.