Q.3 headed ponytail plant growing through roof of my greenhouse
Wanted to know if I could cut the tops off and replant the heads? I’m going to repot the plant this spring and move it to my patio. My plant has not put out any pups or flowers. Didn’t even know it would do that. I started this plant when it was very small. It is now up to 8 to 10 feet tall and needs more room to continue to grow.
How marvelous. You obviously speak "ponytail language." You'll be glad to know that ponytails are relatives of the agave - the heads should root without problems, and you should get sprouting from the trunks just below the cuts. So cut far enough down that it will take awhile for the branches to get out of hand. Here's some more information:
https://www.gardeningknowhow.com/houseplants/ponytail-palm/pruning-ponytail-palms.htm
https://www.gardeningknowhow.com/houseplants/ponytail-palm/propagating-ponytail-palm-pups.htm
If you find you have more ponytails than you know what to do with, you could probably sell some to a landscape company or interior landscaper. Check your favorite directory for more information.