Propagating houseplants by Air Layering is used primarily for large plants with thick strong stems that are not easily propagated by other methods. The new plant is propagated while still attached to the parent plant.
1. Use a sharp clean knife make an upward 1” slit just below a node on the stem of the “mother” plant. A node is where a leaf attaches to the stem. The slit should go 1/2 way through the stem. Place a piece toothpick in the slit to keep it open. If the slit heals shut, the new roots won’t grow.
3. Pack a large handful of moist sphagnum moss around the slit. Cover the moss with clear plastic, and tie the plastic securely to the stem. Check the moss weekly to be sure it stays moist but not soggy.
4. When roots have filled the moss, cut the stem below the new root ball and plant it. Air layering may take months, so try to be patient.