OVERWATERING: The easiest way to figure out if you are overwatering your burro’s tail is to observe the leaves. If the leaves shrivel up before they fall off, you are probably overwatering the plant.
ROTTING: Root rot is a very prevalent problem with succulents. If the plant was not repotted properly or the roots are treading water for a long time, the burro’s tail develops root rot.
This damages the plant and makes the leaves fall off more easily. You need to check the roots of the burro’s tail to determine if it is suffering from root rot.
NEW LEAVES: Sometimes burro’s tail leaves fall off because there is new growth forming at the top of the plant. However, you have nothing to worry about because the fallen leaves will be replaced very soon.
If you see tiny offsets when the leaves of the burro’s tail fall off, it just means that the plant is active and growing.