Being top-heavy as they begin their roadside lives, trees must pass through a five-year period to again grow strong, deep roots that will enable them to withstand strong winds.
這種情形，待移植三、五年後，樹根重又長好才能改善。因此，「新樹一種下去，就得祈禱五年內不要有大台風」，李明宗說。