QuestionsHow to growTrees and ShrubsPruningPrune a Red Robin 0 Vote Up Vote Down Arline Broder asked 14 years ago When is the right time to prune a red robbin plant? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Photinia ‘Red Robin’ can be clipped as a hedge at any time. Heavy pruning of individual plants can be done in spring.