When should I pot a keiki?
Generally, the rule of thumb is to wait until the keiki's roots are at least 2" long, then pot them into fine bark. Some people prefer to let them remain on the pseudo-bulb (or cane) or spike until the drop off on their own. It is not unusual for some keikis to flower while still on the mother plant.
When you water, it is a good idea to spritz the root of the keiki to hydrate the baby as well as the mother.