Bamboo Grove Spacing?

[maskedmole]

I have a good amount of land but much of it is wooded. I only like to grow bamboo in the cleared parts. I ended up spacing my Parvifolia and Vivax about 17ft apart. My Bissettii is farther away, maybe 30ft away. Does this sound like enough spacing or should I clear more land and space them farther apart? I plan on trenching/spading and I may consider using plastic bamboo barriers. I have two 30ft plastic barriers I haven't used yet.

With these methods, I figure I can train the bamboo to grow away from each other to a good degree if they end up wanting to grow too much into each other. I live in Tennessee. I want my bamboo groves to grow to tall heights, at least 20ft-30ft tall eventually. I'm curious what everyone's thoughts and opinions are. I haven't found much information on this online.

[Merlyn]

@maskedmole I don't own any runners, all of my boos are Bambusa or Dendrocalamus tropical clumpers.  So this is just repeating what I've read online.  Generally you need to contain them with thick bamboo rhizome barriers...OR...you can bush-hog the runners as they try to escape the clusters.  I was told that this is effective if you have a very wide clearing around the plantings, probably 30-40 feet or so.  They never stop trying to escape, but can be "managed" that way pretty effectively.  You just have to be relentless during shooting season and not let them get bigger than the bushhog can manage. 

My *guess* is that 17 feet is close enough that some runners will escape a grove and get into the other grove, at least without some kind of rhizome barrier.