Posted: 09/06/2014 at 13:41
Bamboo barrier works, even for quite rampant Bamboo. It sounds like you have quite a well behaved bamboo that has sent out long rhizomes due to their maturity and the mild winter-spring. I would put in a good bamboo barrier and that is all. Case closed. 6 inches is not much btw - I have seen them grow 12ft away. Bamboo and Japanese Knotweed analogy is rubbish, even some of the most rampant bamboo, Sasa japonica, is nothing like Japanese Knotweed.
There is no right to light.