Q.Should I trim back my monkey puzzle
I have a central trunk and two additional trunks on the sides Lots of new growth at the base of the trunks love my tree but concerned I should be looking after it better.
Remove any suckers that have grown near the base of the tree. This is important for the overall health of the plant; a sucker will take valuable energy away from the healthier and more desirable branches.
Be careful not to damage the soft trunk with your pruning shears.
Shape the tree canopy to a desired form. A monkey tree naturally has a round shape that is easy to maintain with little effort.
https://www.gardeningknowhow.com/houseplants/monkey-puzzle/growing-monkey-puzzle-outdoors.htm