QuestionsHow to growFlowersBorder Perennial Flowersmoving New Zealand flax 0 Vote Up Vote Down sheila tangney asked 15 years ago I want to move a New Zealand flax, its about 4ft and I was hoping to put it in a large container. Will it survive in a container and what is the best time of year to move it? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago New Zealand flax moves well but can be difficult to shift if the plant is big. It does fine in a pot but better in the open soil. It can be moved between October and March.