In the spring or summer, prune stem cuttings from the parent plant in inconspicuous places.
Cut off several inches in length, dip in root hormone (mixed in water at a paste consistency) and place in damp, well-draining, moist potting soil mix and tamp down around the stem to secure them.
Use a container that has drainage and is deep enough for the roots to grow. Plant at least 1-2 inches down into the soil.
Mist inside a clear plastic bag to create moisture and humidity. Place the bag over the top of the plantings and let it set over the planter. There is no need to tie off the bag but allow a little airflow under and into the planting pot.
Set them in medium, indirect sunlight while they are rooting.
Check the moisture and humidity each day and add misting to keep the soil moist while the roots establish.
After 6-8 weeks, roots will begin to form. You can tug onto the stem to ensure the roots are establishing.
Another way is to take the cutting and place in water. Replace the water weekly and observe the growth each week. Once you have several healthy roots, place in soil with rooting hormone sprinkled on the roots to help get established.
If several stalks are in the pot, divide the plants from the mother plants by gently removing the soil and separating the roots. Repot the new plants in smaller pots with indoor potting mix. Water and set in low to medium light while they get settled and mature.
Note: Wear gloves while handling this plant. The sap contains calcium oxalate crystals which can cause blistering, swelling and dermatitis on the skin.