There has been a lot of recent products that really can assist with this problem for bamboo. The best solution is to start with a clumping varietal of Bamboo which will only spread a couple of inches each year from their non-invasive, dense root structure. Now spreading Bamboo, which I have seen pop up completely on the other side of a 20' concrete patio from the main grove, is a whole different creature! If left to its own devices that patio could be in shambles within a couple of years! If you are looking to have a specific area grow in quick, then Spreading Bamboo is the way to go, but certainly use either a sunken container / pot or you can use a bamboo root barrier to fill in larger areas without having your bamboo escape and wreak havoc! Here is one product I have been suggesting to clients who want to have quick results but without the headache!
http://www.shweeashbamboo.com/Cl...