Answer: You have two choices. You can plant spreading types, and be very diligent about keeping it in bounds, by diligent mowing, a buried barrier or large ditch, by severly limiting water availability, etc. Better, I think, would be to choose a clumping varietythat will be easier to manage. <br><br>When you say 15-20', I assume you mean the height of the plant. The variety Sinarundinaria netida is a clumping bamboo that is hardy to -20F; it grows well in both sun and shade.
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