QuestionsHow to growFlowersBorder Perennial FlowersRestricting agapanthus roots 0 Vote Up Vote Down Jean Murphy asked 13 years ago Agapanthus in south facing bed didn’t flower last year – should I put restrict their roots within the bed to encourage flowering? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Agapanthus probably got a touch of frost in winter of 2010 and was recovering last year. Give a shake of general fertilizer in spring if you like.