|Your FAQ re control of (neighbor's) bamboo mention one foot barriers as sufficient to control and, jokingly?, 7 feet. What's your very best suggestion for depth?|
|If you think of bamboo as a giant grass, you'll understand how it spreads through roots and rhizomes. Not all bamboos are invasive, but the running types of bamboo have root masses that travel 3'-4' deep, and spread 15'-20'. So, the ultimate depth will depend upon the type of bamboo you're growing (or trying to contain). Hope this clarifies things for you!