I am in the Ottawa region and went to two different stores (SuperStore and Home Depot). They are both selling this plant but one is selling it as an annual and the other as a perennial. Can you tell me your experience with it? I really want one. And another thing, there are three stalks and I wanted to divide them to put in different areas but the clerk suggested not to as that is what he thinks he heard from another employee? Can I separate them or do they have sensitive roots? Thanks.