Some succulents root really easily just placing it on top of the soil, without need of burying the ends. Are you using a small spray to spray water? (That has helped me propagate common pachyveria, graptosedum, aeonium stuff) Is it really hot over there? You could put a plastic covering over it but I'm worried that cuts out too much sunlight. You could buy rooting hormone (not sure from where) or get a bit from a freecycle forum (local community forum), I've seen people ask for it. I heard it really helps.

Maybe someone on this forum has had exp with rooting this type before?

Hey Ealdwood, yes I am using a small spray. It is placed near window but with some potted plants in front of it, so it's not hot and with filter light. It's just that I don't understand why root is thinning out. I have tried once propagating a succulent leaf before and the end result is similiar to this and it eventually die on me. Does the soil need to be damp at all time until new growth is coming out?

My leaves/cuttings are usually placed on a mix of small-sized perlite and store bought cactus/succulent soil. There's no pea stone, pebbles involved. Did you previously also use those round black pebbles? It could help maybe not using those but be careful about spraying them/the dirt too much, it could lead to rot. I spray them every two days if its hot...sometimes I forget for a week but that might be why my cuttings grow so slowly.

Generally speaking, I am pretty good at rooting leaves. It ain't brain surgery, though.

But this one Peperomia and a couple Aeonium leaves are ones that I have never been able to root from a leaf. I've had the leaf live like that for a year, but never successfully rooted. Buried, laid, dunked, or prayed over...nada.

Rina, have you rooted this leaf specifically? If so, teach me how!

For rooting hormone, it's not necessary and there are too many uncertainties. Hormones act differently with each species and you may end up inhibiting root growth instead of encouraging it.

If you know they are compatible, then maybe it's worth it. But a small bottle is $5-10 and most likely it's not even required.

Just in case you missed this string:

http://forums.gardenweb.com/discussions/1765830/peperomia-graveolens-propagation

Not sure how to produce "bottom heat" that sounds interesting.

Bottom heat can be produced by setting you cutting container on your cable box, router, refrigerator, etc. or you can buy a seed starting mat that you plug in. I use a thin plastic container from Trader Joe's salad and put 2" containers in it. The salad container keeps water from getting into my electronics. The 2" container where I have seeds or cuttings have drain holes.

Grace, peperomia are different than regular fleshy succulent leaf propagates.

they need to be buried.....it's much more like AV leaves than echeveria leaves.

Grace

If you wondering about me rooting pepperomia or aeonium, I never tried. I thought Aeonium propagates from stem cuttings.

Which pepperomia are you talking about? I tried Pepperomia ferreyrae, without success.

Rina

Lati, I've tried all methods but cannot propagate the leaves. As mentioned, I've buried, too. Never worked. The stems root no problem (though the process is slower than molasses) but not from a leaf cutting.

Rina, I am only referring to my P. graveolens leaves. The obtusifolia and clussifolia, I've always rooted by stem only and never even tried a leaf, now to think of it. But I have lots of those whereas everyone seems to want this plant when they come over, so I was attempting to make more...unsuccessfully.

Well, I've gotten the obtusifolia and the caperata to root and make plants. Lots of plants.

I tried the tricolor like in your pictures but didn't take good enough care of them or something, they rooted but I gave up before I ever saw any plants.

thanks guys :) i will take in all the advice and try my luck to see if the propagation is successful