Q: I was given a Peace lily in 2006 and it has become quite large. When and how do I split the plant down to a reasonable size? I would like to give a piece to the person who gave me the plant.

"Peace lily" (Spathiphyllum cv.) can be divided during winter, spring or immediately after flowering. When dividing the rhizomes, make sure you keep at least two to three leaves per division. Pot the root division into a general potting mix just covering the roots; for example, 7 cm pot. Water with a transplant solution as directed on the package. Do not fertilize for the next three months. Treat like a mature peace lily.