Loved the diagrams.

Mar 29, If you are wondering when to prune Leyland Cypress, then summer is your best time frame. During the first year, trim the top and sides to start forming the shape you desire.

During the second and third year, trim just the side branches that have wandered out too far to maintain and encourage foliage bushlopping.barted Reading Time: 2 mins. Sep 15, The best time to prune is in early spring, before the annual growth spurt begins. This also gives you the chance to sort out any winter damage.

The dense foliage of a leylandii can collect a lot of snow and ice, so broken branches aren’t unheard of. If you feel like doing some more light shaping any time through to about mid-summer, though, go ahead/5(K).

Its thick branches shield it from winter damage.

When is the best time for leylandii pruning? Leylandii pruning should be approached with great care and only carried out between the months of April and August. Three cuts can be made during the growing season providing Always remember that conifer trees such as leylandii will not stand up to hard bushlopping.barted Reading Time: 5 mins.