From my perspective, water is life, but it must be just right. My roots need to breathe! If the soil around me is constantly soggy and wet, my roots begin to suffocate and rot. Once this happens, they cannot absorb water or nutrients, and my leaves, no longer supported, will turn yellow and drop off. Conversely, if you forget to water me for too long, the soil becomes a dry brick. My cells lose their turgor pressure, like a deflating balloon. My large, beautiful leaves will become limp, then crispy brown, and finally fall in a desperate attempt to conserve the little water I have left for my core survival.
I am a creature of habit. In my natural habitat, I grow under the canopy of larger trees, accustomed to bright, consistent, and filtered light. If you suddenly move me from a bright spot to a dark corner, or vice versa, it is a profound shock. I must shed leaves that are no longer efficient in the new light conditions to redirect my energy. Similarly, if you bring me home from the nursery or rotate me too frequently, I interpret this as an environmental crisis. The drop in leaves is my way of downsizing to cope with the stress until I can adapt to my new circumstances.
To sustain my grand foliage, I require a steady supply of nutrients. The potting soil I live in is a finite reservoir. After several months, it becomes depleted of essential minerals like nitrogen, phosphorus, and potassium. Without these nutrients, I cannot perform basic photosynthesis or maintain my cellular functions. The lower, older leaves are often sacrificed first. They yellow and drop so that the nutrients they contain can be broken down and redistributed to support new growth at the top, where the light is best.
I am a tropical plant, and I despise the cold. Drifts of cold air from an frequently opened door, a nearby window in winter, or the direct blast from an air conditioning vent feel like an Arctic winter to me. This cold stress causes me to go into shock. It disrupts my internal water and nutrient transport systems, and my response is often to drop leaves. I much prefer a warm, stable environment with consistent temperatures, free from any sudden chills or hot drafts from heating vents.
Sometimes, the issue is not the environment but a physical ailment. If my roots are rotting due to overwatering, the problem is internal. Pests, though less common, can also be the culprit. Tiny insects like spider mites or mealybugs may suck the sap directly from my leaves and stems. This theft of my vital fluids weakens me significantly. The infected leaves often develop spots, yellow, and drop as the pests damage the tissue and I am forced to sever connection to conserve my resources for a fight.