How often do I need to trim a leylandii hedge?
Once or twice a year will keep the hedge neat. There is less waste to get rid of and it is an easier job if you trim it twice a year. We trim ours once a year on the nursery and this keeps them looking good. We do not recommend trimming them more than twice a year as it can weaken the plants especially if they are trimmed back too hard. We recommend leaving 10cm (4in) of green growth on the hedge. Do not trim it back close to the brown. All hedges made of evergreen shrubs (e.g. laurel) need trimming once a year.
