It sounds like it didn't like the fertilizer mixture. The stems of Kals can turn woody over time but yours looks like it may be dead. You should be able to save the green parts by cutting them off, letting them dry overnight, then sticking in a pot of fresh, new soil.

If it is K. blossfeldiana, it wasn't getting enough light, the nodes are very far apart.

I don't know what caused the dying stem, but your plant also in need of more light (notice the distance between leaves and the skinny branch). You can try take cuttings from healthy(ish) branch/stem, this plant propagate easily.

Edit to add: do the propagation as Tiffany said above.

Please do not take this wrong way, but the concoction you describe sounds little weird to me. Making these kind of "fertilizers" is just a shot in the dark - you do not have any idea and control over what and how much is in the mixture in a way of 'nutrients'. If using any fertilizers, it is best to buy one and follow instructions. That way you know exactly what and how much was supplied to your plant.

What do you refer to as: ...'has been growing very well'... exactly? Was plant full of leaves? Were they good size and color? Did it bloom? Or perhaps it grew a lot, and got tall? Do you have photo of it then by any chance?

Thank you Rina_Ontario

I have a picture that's not clear. I mean by growing well that new stems was growing that I felt the pilot is becoming small for it, and it was getting tall. It used to bloom from last Jan to July as I remmember then it stopped. I read online that it stops blooming and then will rebloom again in January like this year.

Here are two photos, one that I took one month ago, and the second one was in May

Yes, it's K. blossfeldiana, a gorgeous double-flower cultivar. You read correctly, they are short-day bloomers. Mine are just getting started blooming for the season but I don't have one with flowers as pretty as that!

Nice, rose-like blooms.

In photo from May, plant has lots of leaves (from what I can see in the photo).

There is some white 'stuff' on soil surface visible in photo from month ago - what is it? Did it appear after you started watering with that home-made fertilizer? It looks almost like a fungus - and if it was, I would be almost certain it is from the bananas/coffee/egg shells. I would suggest not to use anything organic in containers, and especially for succulents.

I suspect that plant didn't like it. It probably doesn't get enough light either - these plants do not need strong sunlight, but they need good light. I also think that it is 'suffocating' in that soil+fertilizer mixture.

Succulents need good drainage. They should be watered when soil/potting mix is almost totally dry.

As Tiffany already pointed out, these plants will grow woody and taller stems as they age. But they still should have plenty of leaves, and stems sturdy enough to support themselves.

If my plant, I would prune the green stems, let them callus and then stick into fast draining mix. You could keep the part with roots - maybe you'll get some new growth on original stems. It should also be repotted into better mix.

Thanks.

If you mean by the white stuff like those in this photo, I don't know what is it, but it has been there since I bought it

Thank you all for your advice, I really appreciate it.

Mariam

No, the white granules are most likely perlite (or could be pumice), and that is good - helps soil drainage, and I would add much more of it. I was looking at the photo that seems to have whitish area on the soil - looks almost like a piece of torn issue - circled in orange:

I don't agree with the totally dry part. K. blossfeldiana is quite thirsty, older leaves shrivel prematurely if soil gets dry.

Plants that are never dry:

Anything could be rotting in that (what looks like) peaty soil, especially plant roots. The shriveled stems look dead, taking cuttings should help you save this.

Tiffany

I agree that kalanchoes could be watered little more often than some other succulents. That's why I said 'almost' totally dry, but maybe that is not a good way of describing it :) What I should have said is: make sure that plant doesn't sit in constantly wet potting mix (not sure if that is any better?); or let potting mix almost dry out (?) between watering...not easy to properly describe. I like the way Japanese bonsai master said it: ...when soil is dry, water day before....(something like that, lol).

I would take cuttings as Tiffany said. Then dump the mother plant out of the pot rinse the dirt off then repot in fresh soil. What have you got to loose, this plant is very tough and may like the new soil.

Thank you all. I cut the green parts and propagating it in new soil. This is how the mother root look like. Can I still propagate this?

It looks dead to me, but the only way to find out is to put it in a new pot, give it a drink & wait.

It does look too dry in the photo.

Here is a mature stem cutting that grew leaves:

Hello again :)

I have another question. I tried to propagate as you advised, after putting it in a new soil, this is how it looks from bottom, it has been 10 days and no roots yet. I have no idea what I am doing wrong

The ends of these look like they are necrotic, dead. Trimming at a point where the cut is made into healthy looking green stem is what I would do. Let them dry overnight, then put in a pot, submerging at least 2-3" of stem.

Very nice, Rina! Your mature stem is healthy, uniform in diameter, not shriveled and bumpy looking. IME with this plant, stems that look bumpy and shriveled are dead. I have let a few get too dry in the summer heat and they shriveled.