Hello, I planted a bunch of Lombardy Poplars because I wanted a quick-growing screen, but I didn't research them beforehand! I only intend to have them in for a few years. How long does it take for the suckers to start spreading? I planted them close to the house in the front yard, so I am worried that even in the first year they could do some damage to the water system or the yard. Any help would be greatly appreciated!