stem and leaf cuttings in the spring,let them dry out first. You could cut rosette off(let dry) and plant in a real sandy soil. More suckers will probly shoot from the stem even after rosette is removed. Rots your worst worry dont over water!

The best time to root aeoniums is in early fall--September is the earliest time to start. Undulatum only makes new shoots from the base. The stems with rosette grow a few feet tall and eventually flower. Then the entire stem dies back to the ground. The plant continues from the suckers that have come up. If no suckers then the plant dies out. Cutting a rosette will work and should force the stem to make offsets. Let the cutting sit in bright shade for a few weeks and then plant in sand or potting mix. This species resents hot sun, so keep it out of hot afternoon sun.

If a stem blooms, you can easily grow it from seed--let the inflorescence fully dry and then crush the flower heads and scatter on the soil of other potted outdoor plants. The best time to scatter seed is fall. August is a good time as the seed will only need to wait a few months for cool weather and more soil moisture for germination.

Jon in SF Bay Area

Useful answers.. Als,o come across this video, might be helpful for future readers.

https://youtu.be/mrZ-5ack898