It does require regular pruning to keep a neat shape.
He says that if it's given regular pruning there's no reason why it shouldn't live for a few hundred years more.
Once the trees have reached the required size and shape, they will need regular pruning to keep them that way.
It requires regular pruning and maintenance including weekly hand trimming.
It grows very rapidly and hence needs regular pruning.
Fertilizer needs are low; some species need regular pruning.
Trees can grow up to 30 feet tall but are often kept well under this height by regular pruning.
Trees can grow over 20 feet if allowed to do so, but are often kept well under 10 feet in height with regular pruning.
It is fast-growing but ultimately untidy in habit, and would benefit from regular pruning.
Over the next three-four years, the tree needs good care, with regular pruning so that it grows sideways, equally all around.