QuestionsHow to growFlowersBorder Perennial FlowersLily seeds 0 Vote Up Vote Down geraldine kennedy asked 16 years ago I’ve just cut the dead flowers of some Arum Lilies as seed was forming. Can I sow these seeds to produce more lillies next year? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago You need to let the seeds fully develop and then they can be sown right away to produce new plants, or simply split the old one.