QuestionsHow to growFlowersSummer colour from seedproblem with sweet pea 0 Vote Up Vote Down herbert armitage asked 9 years ago Do sweet pea need to have their center tips removed to make them spread out more? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Yes, they are usually pinched ut at about 10 to 15cm to make new side shoots grow. But it is not essential.