From my perspective, the constant saturation of my soil is a terrifying experience. My roots, which are designed to seek out both moisture and pockets of air, are instead perpetually submerged. I cannot breathe. Root cells require oxygen to function, and without it, they begin to suffocate and die. This creates a critical failure in my system, as these rotten, brown, and mushy roots can no longer absorb water or nutrients, no matter how much is available. You might see my leaves, my primary solar panels, beginning to turn a uniform pale green or yellow, particularly the older ones. They will feel soft and limp, and the entire plant will take on a wilted, sad appearance, even though the soil is wet. This is the cruel irony of overwatering; I am dying of thirst because my drinking apparatus has been destroyed. Furthermore, the constantly wet and oxygen-poor environment is an open invitation for fungal pathogens like root rot to attack my weakened defenses.
Conversely, when I am not given enough water, I am launched into a desperate struggle for survival. My first reaction is conservation. To prevent losing precious moisture through transpiration, I will close my stomata—the tiny pores on the underside of my leaves. Without this vapor exchange, I begin to overheat and my internal processes slow down. The most visible sign of my distress is wilting. My leaves and young stems will droop, losing their turgor pressure—the rigid water pressure that keeps me upright and structured. If the thirst continues, the wilting becomes permanent. You will notice my leaves changing texture, becoming dry, brittle, and papery to the touch. They will often curl at the edges to reduce their surface area. The coloration will also shift, turning a dull, muted green before progressing to brown, crispy scorching, particularly at the tips and margins of the leaves. This browning is a form of necrosis; the leaf tissue is literally dying from a lack of hydration.
I cannot speak your language, but I communicate my needs through the medium you provide me: the soil. The most reliable way to understand my condition is to touch it. Do not simply look at the surface. Insert your finger about an inch or two into the soil near my base. If the soil feels cool, wet, and clings to your finger, I do not need more water; I need air. If the soil feels warm, dry, and crumbles away, I am telling you I am thirsty. The goal is for the soil to feel lightly moist, like a well-wrung-out sponge—this is the environment where my roots can thrive, accessing both water and oxygen. Please also consider my pot and the weather; I drink less when the skies are cloudy and more when the sun is bright and warm. By learning this simple language of touch, you can become a much better interpreter of my health.