These have been propagated from leaf cuttings. It takes a couple years before you get such large and beautiful plants from a single leaf. But it happens!
These are growing in what we call a “Mud Flat”. Here, let me google that for you. Well, that’s not what I’m talking about. I wonder if I can find any pictures online? Here we go. And here’s a pretty application.
So that’s how we do it.
And a bonus! Here’s a leaf cutting with plantlet and rootlets for you.