QuestionsHow to growFlowersSummer colour from seedProblem with sweet pea 0 Vote Up Vote Down Rosaleen Carvill asked 14 years ago Withering and dying after first flowering 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago This is either due to dry soil, which can also bring on mildew disease, or wilt disease due to growing the plants in the same place over and over.