Hello. I am lucky enough to have a mature 25 (ish) foot monkey puzzle tree in my front garden. Apparently it is femail as it has fruit. Question is can I prune the tree not specifically to reduce the size but to remove some of the brown leaves and 'branches'? I obviously do not want to damage the tree as it is healthy and happy. Any toher care advice appreciated. Kindest Gregg Torquay Devon, UK.