Rot at the base
How to tell
Soggy roots at the base can also cause drooping because damaged roots cannot take up water. The soil is wet, the base feels soft, and adding more water makes the damage worse. Small dark flies around moist potting medium may be fungus gnats. They suggest conditions suitable for breeding, without proving that the surface never dries.
The fix
Water according to moisture, only when the top 5 cm (2 in) of soil feel dry. Check drainage and do not water just because a calendar says it is time. Remove rotten roots and replace soggy mix. For rescue cuttings, wear gloves against irritant sap and use healthy stem tissue with a node. Allow the cut to callus, then root in airy, lightly moist medium. A lone leaf without a node cannot make a new vine. Wear gloves before cutting or taking cuttings. The milky sap can irritate skin. Wash your hands after handling, and avoid touching your eyes.
