Good question, Masud. Since everyone's growing conditions are different, I can only report on what has worked for me. There is certainly more than one "right way". Her zone is warmer than mine and I don't know where she has her tender succulents.. Right now I have my tender succulents inside where some of them are happily putting out new growth, blooming and rooting. Others are in their resting phase for the winter (notably the Euphorbias). Some succulent leaves such as the ones she has shown can lay on top of the soil for a very long time (months) and they will either root or wither, shrivel and go back into the soil. I've never found humidity to be a big factor with mine. Others may have a different experience.
