You could try, but calathea is normally propagated by division. You see, its stem is underground and is called rhizome, quite like peace lilies, and the leaf goes out direct from it, with a petiole conecting both [sorry if theres any mistakes I dont remember quite well plant morphology]. Because of this, leaf propagations are very hard, normally you would divide the plant by unpotting it, if its big enough for the dividing, and cutting a bit of the rhizome with leaf and root. But you could try leaf propagating, just quite rare.

I appreciate your response. I read online (can't remember where) that Calatheas can be so sensitive that if you separate them, even just when repotting, there is a good chance they will die. Someone had written about there experience of doing this and all of them died very quickly afterwards. And someone responded that is very likely to happen with Calatheas. It has made me nervous to even repot mine, much less separate/propagate it. That's why I was asking about leaf/stem propagation.

Never tried but I don't think leaf/stem propagation would work. My orbifolia is still a bit small but my metallica flowers and produces seeds like crazy, and lots of seedlings. If your orbifolia flowers be sure to have it outside for any pollinators that might come by. May or may not work, but worth a try.

Thanks for your input, tropicbreezent!

Calatheas can be quite sensitive. But I think if you do it in the growing season and dont traumatize heavily the roots it should be okay. It may have a period of recovery, so you need to treat it right in this period.

You may even want to leave it in plain water for a while if it works for you