It may yet reward you with a nice plant, keep it in clean water for now till the roots grow past the stem anyway. Try to keep it 70 degrees or higher if you can. Keep checking it. The leaves at their base look healthy. Fred when Rooted the tops in Florida (so long ago now), I cut the top row of fruit off and plunked it down in the water. The fruit always rotted away, you had to change the putrid water every day, which usually was so bad it would start to foam slightly. That is the way you did it back then, of course it was always 80 degrees or higher with 80% humidity. But it worked! The only trouble I ever had was with the dratted squirrels eating chunks out of the ripening fruit! 3 years of waiting and then some scurvy grey squirrel eats the very first spot to ripen and the whole fruit then rots!

Usually you want a plant to be healthy before you try to propagate it since it's usually a stressful event for a plant. I'm not sure what type of plant that is, but it looks like it would be able to be propagated from root/rhizome cuttings. BTW - The way it's dying from the bottom->up indicates it's an over-watering problem to me. If that's the case, it could be cleared up by letting it dry out more before watering it again (and make sure the holes aren't clogged up on the bottom of the pot)

Trying to propagate a rose using the air propagation method. When should I cut and plant the propagated segment? propagation roses I have had one of those plastic balls attached to a climbing rose since May this year Is it now a good time to cut the segment and plant it in the ground ?

The common way of cutting is to cut or pull a leaf and put the cut edge in soil or water. I am wondering if we can cut the leaf in strips as in African Violet propagation, in the hope of getting more plants from one leaf. Has anyone tried that? Also, could you tell what kind of kalachoe I have (I mean the scientifc name) from the picture? Thanks in advance!