So Mrs McGrath and the team have taken the tough decision to shut the park for a couple of days to have the trees removed, although the museum will remain open. They hope to sell the logs for export and some of the branches for pulp and she said there were plans to keep some memento so the tale of the fence-post trees could still be told.
"We will definitely plant other trees in their place - they are home to pigeons, tuis and other native birds, so it is a shame they have to come down."
Aspen poplars are also commonly known as cottonwood trees and Mrs McGrath said that in December they would drop pods that burst open to release a cotton wool-like material.
"It was like it had been snowing."
She said they were also attractive in autumn when the leaves changed colour, but the maintenance team would not miss clearing up the fallen leaves.
Work on removing the aspen poplars is expected to start early next week.
Email: julie.taylor@dailypost.co.nz