How often should I trim my trees? Young trees: May need trimming every 2-3 years for structural development. Mature trees: Typically require trimming every 3-5 years. Fast-growing or problematic trees: Might need more frequent attention 2024-02-14T19:00:40+00:00February 28th, 2016| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTumblrPinterestVkXingEmail