Christmas cacti are beautiful plants that bring holiday cheer to any home. They are best repotted during their dormant period, which is typically between March and October. During this time, the plant is not actively growing, so it will be less likely to experience shock or stress from the repotting process. Repotting should be done carefully, using a pot that is only slightly larger than the current one, and ensuring that the roots are not disturbed. Once repotted, the plant should be placed in a bright, sunny location and watered regularly.