but you are afraid of it spreading, keep some in a pot. This poor neglected thing has been in a pot against the house getting morning sun with shade that comes only after the sun moves past the planter next to it, and it has done ok in this situation. There have been talks about LOV and its evasive nature, but this works for me.
I think I'll re&re it, so I can bring the soil level up some in this pot. I think it's in its 4th year now, and I'm still waiting for it to outgrow this pot!