About two years ago I bought a sprig of broom in a pot - it was literally one stalk and cost about £1-49. I planted it in front of my front door and did nothing special or encouraging. It likes it there, it really likes it! In fact for some reason it has developed a life of its own. It looks a bit like a 170cm tall blond afro half way up my path. You can't help but love it, it's so vigorous. And it smells great too!