Aerangis orchids can be multiplied through several methods including division, seed propagation, and stem cuttings. 1. Division: This involves separating a mature plant into smaller sections, each with its own set of roots and leaves. To do this, first, remove the parent plant from its pot and gently separate the roots with your fingers or a knife. Then, using a clean and sharp tool, divide the plant into sections with at least two or three roots and a few leaves. Repot each section into its own pot filled with a well-draining orchid mix. 2. Seed propagation: This method involves germinating seeds to grow new plants. Collect mature seeds from a healthy plant and sow them in a sterile potting mix. Keep the soil moist and at a temperature between 70-75°F. Once the seeds have germinated, wait until the second leaf appears before transplanting them into individual pots filled with orchid mix. 3. Stem cuttings: This method involves taking stem cuttings from a healthy plant and rooting them to produce new plants. Cut a stem with two or three leaves and at least one node using a clean and sharp tool. Dip the cut end in rooting hormone and place it in a pot of moist orchid mix. Keep the pot in a warm and humid environment, and mist the cutting regularly to keep it hydrated. After a few weeks, the cutting should take root, and you can transplant it into its own pot.