Ornamental tree in raised bed
Hi I have created a raised bed out of wooden sleepers measuring 900mm x 1500mm x 600mm deep and would like to plant a small ornamental tree with an eventual height of 2-3mts. Can anyone recommend a tree where the root spread is not likely to be restrained by or damage the sleeper walls. Quite like the look of ornamental cherry trees. Novice gardener so any expert advice would be most welcome.