I have a Holly "tree" in my garden. I don't know the variety - it does not produce berries. It has grown too tall. Would it be damaged if I was to have the tree shortened, i.e. the crown taken out, to bring it to the same level as other shrubs in the vicinity? I would appreciate your advice. Thank you.
You can cut them back by about a third without doing any harm. If necessary, you can take another third next year until the shrub/tree is the way you want it. As for having no berries, this would be due to the fact that you only have one holly. Both a male and female holly are needed in order to get berries, which are only produced by female plants.