What happens if you chop the top off a ponga tree?

Chopping the top off a ponga tree (also known as a tree fern) can severely damage the plant. Ponga trees grow new fronds from a central growing point, and removing the top can hinder this growth, potentially leading to the tree's decline or death. Additionally, it may expose the inner trunk to disease and pests. Overall, it is not advisable to prune a ponga tree in this manner.