Corner lot in desperate need of privacy-stucco planter box w bamboo? - We just bought a house that is totally exposed to the street. Most people in the area have hedges but we were trying to think of something more creative. We love bamboo but it runs. So we thought of doing a foot or so wide stucco planter box 2 ft high with bamboo all the way around the yard. We want it to be private but can't have the bamboo grow too tall. Any suggestions? »