These are the classic giant bamboos that are so prized by people all over the world. Some are tropical giants and others are for temperate areas. The mature height of these bamboos range from 40 to 70 feet. The culms have a diameter between 3 and 7 inches. Give the big running species at least a 25 X 25 foot area to create a grove. If a smaller area is needed install a rhizome barrier.