probably the pot is too small by now. Needs a larger pot (or plant in ground) and water. Likes mostly sun. They are not winter hardy.
btw
You should change your settings to show your state or zone where you live. That way people will know how to advise you on plants. It is hard to do that without knowing what the climate is like where you live. You don't have to show a city if you don't want or a zip, just your state or zone would be helpful.
