To start a Christmas cactus from cuttings, follow these steps:
1. Choose healthy, mature cuttings from a well-established plant.
2. Cut them at a 45-degree angle, leaving one or two nodes on each cutting.
3. Allow the cuttings to callus for a few days before planting them in a well-draining potting mix.
4. Keep the cuttings moist but not wet, and place them in a warm, sunny location.
5. Within a few weeks, roots should start to form, and the cuttings should be ready for transplanting into a larger container or into the ground.