QuestionsHow to growTrees and ShrubsPlantingcordline australis seeds 0 Vote Up Vote Down ita hannon asked 14 years ago I want to try grow cordyline seeds when they ripen whats the best way?? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Sow the seeds when ripe, either outdoors in the open soil or in seed trays. It germinates easily.