Can hedges be trimmed in the winter?

Yes, some hedges can be trimmed in the winter even though no, others cannot. New deciduous hedges handle formative pruning in winter and maintenance pruning in summer whereas new evergreen hedges respond well to formative pruning in spring and maintenance pruning in summer. Winter pruning must be carried out on a dry, mild day and needs to prioritize removal of dead, diseased and overgrown parts.