Root from stem cuttings
Christmas cactus can be easily rooted from stem cuttings. Here’s how:
Take a stem cutting of two to three joined segments. Let the stem cutting dry out for a few hours so that it can form a callus. Pre-moisten a sterile soil mix which should consist of 50% peat and 50% sand or 70% perlite and 30% peat. Vermiculite instead peat or perlite will also work.
Fill a 3″ pot and place the cuttings 1-1 1/2″ deep into the soil mix. Place the pot in a plastic bag and keep the soil moist in a warm shaded spot away from direct sun. You should see new roots in 2-3 weeks. Once the roots develop, plant in a well drained potting soil mix consisting of 50% peat and 50% sand or any well drained standard mix soil with 25% peat or sand added to the soil mix.
When watering, allow the soil to dry between watering to keep the cuttings from rotting.
Cuttings root best when taken in spring and summer.
Christmas cactus from seed
Germination is best when the seeds are fresh. Plant your seeds in a fine seed mix in pot or a shallow tray. Sprinkle the seeds and cover with a fine layer of seed mix or a layer of fine grit. Water in seeds, cover with a plastic bag, and keep at 66-70F (19-21C) in partial shade. Once germination takes place ( few weeks) remove the plastic cover. Don’t keep the soil too wet or too dry and keep them in bright filtered light.
You will have plants in 3-4 years.