It's best to divide a Christmas cactus during a period of dormancy rather than during a period of growth, so wait until the flowers have fallen off. Gently remove the entire root ball

from the pot by grasping the base of the plant and wiggling it free. ... You can transplant any stem that has roots attached to it.

When can I divide my Christmas cactus?

Although you can grow them outdoors in U.S. Department of Agriculture plant hardiness zones 10 through 12, they usually are grown as houseplants. The plants last five or six years, and with good care, they grow to fill a very large pot. You can separate a Christmas cactus in late spring or early summer.

How do you split and repot a Christmas cactus?

Another option is to divide the mother plant. To do this, remove the plant from the existing pot and use a sharp knife to remove sections of the plant with roots still attached. These sections can then be transplanted into separate pots. The mother plant can be replanted in the original pot or moved to a larger one.