I've read conflicting statements about the size of Teksa. I had planned to put it on an arbor with Mme. Ernest Calvat until I read that it only gets to 5-6'. Then I read somewhere that it gets 6-8'. The first will do in a pot with a shorter pillar while the second is too tall for that but is it really tall enough for an 8' arbor? Until I feel confident about how tall this one will get I'm not comfortable about planting it anywhere. Can someone tell me their experience with Teksa?