What to Do If a Potted Succulent's Leaves Rot? Causes and Treatment Methods
Rot is one of the most common diseases in succulents, usually a fungal infection caused by overwatering or an overly humid growing environment. Most succulents grow in desert climates and are adapted to extremely arid growing conditions, so they must never be overwatered, and the soil should be allowed to dry out completely between waterings.
Most succulents grow in desert climates and are adapted to extremely arid growing conditions, so they must never be overwatered, and the soil should be allowed to dry out completely between waterings. Another cause of rot is soil medium that is not breathable, especially for milkweed (Asclepiadaceae). Be sure to use a drainage medium to ensure water does not sit pooled around the stem for more than a few minutes.
Another cause of rot is soil medium that is not breathable, especially for milkweed (Asclepiadaceae). Be sure to use a drainage medium to ensure water does not sit pooled around the stem for more than a few minutes (the medium I personally use is usually one that is completely soaked through as soon as water is poured on).
Some insects, such as mealybugs, can also cause rot, especially root mealybugs. The wounds created when these pests feed on plant sap can lead to fungal infection. Rot manifests in many forms, and by the time you notice it, it is often already too late. Always be on the lookout for discolored areas on the plant, as well as soft, mushy stems and leaves.
There are two situations in which succulent leaves rot: one is too much water, and the other is lack of breathability. Too much water usually means the roots rot first and then the rot spreads upward to the stem and leaves. If the soil is not breathable or the fertilizer is too strong, the whole plant will drop its leaves and the leaves will rot. Removing the rotten leaves should take care of it. If it is an infectious rot, it is best to dig the plant out, rinse it, remove the rotten leaves, and check whether the infection has reached the roots and stem. If there is water-soaked tissue or red spots, those parts must be cut away. It is best to apply rooting powder, then place it in a cool, shaded spot to dry. After a week it can be planted, with a loose, breathable substrate and not too much moisture, otherwise it will rot again. When watering, do not pour water into the center of the leaf rosette; if the water does not evaporate in time, it will rot, and the plant will die almost instantly.
Once any part of the plant becomes discolored and soft and mushy, it has rotted. Once rot occurs, it must be cut away immediately. Both the cutting tool and hands must be disinfected before and after to avoid spreading it to other plants. In the case of fungal infection, spray the plant with a fungicide, and the wound must be completely dry before it goes into soil.
Note: When dealing with a rotting plant, be sure to keep tools clean and sterile, and be sure to wash your hands thoroughly before touching other plants.