Elaine, mine is in a shifting sun/ shade. I've just fertilized on the same schedule as most of the other Aroids and I always do a 1/2 strength 20/20/20. I guess it just needs to grow up a bit more. I haven't tipped the pot out to see the size of the tuber.
As you can see, at least with this plant...patience isn't one of my virtures.
