Is there some way to encourage a ponytail plant to produce the pup plants? I have had my plant for about 30 years, and it has never produced pups.
Pup Plants on a Ponytail Plant
Certified GKH Gardening Expert
There is a risky practice of knicking the base with a sharp clean knife. This requires wiping with peroxide daily to ensure that the wounds don't get infected. Like I mention before, though. It is a risky practice.
With time, and optimal growing conditions you plant will produce pups on its own. This article will give you an idea of what conditions they prefer: https://www.gardeningknowhow.com/houseplants/ponytail-palm/ponytail-palm-care.htm