sentences:  Seedlings will tolerate shade, but saplings and older trees demand full sunlight for good growth; in forests it typically regenerates in gaps created by windblow.Growth is rapid, particularly with root sprouts, which can reach 1.2 m (4 feet) in the first year and 4.5 m (15 feet) in 4 years.Root sprouts often result in dense thickets, and a single tree, if allowed to spread unrestrained, will soon be surrounded by a sizable clonal colony, as its stoloniferous roots extend in every direction and send up multitudes of shoots.