From my perspective as a spider plant, the question of watering is not about a fixed schedule but about maintaining the ideal soil environment for my roots. My native habitat is the understory of South African forests, where I receive consistent but not excessive moisture. My thick, tuberous roots are designed to store water, making me tolerant of occasional lapses, but I truly thrive in a specific moisture range. I dislike being constantly soggy, as this suffocates my roots and invites rot, but I also suffer and become stressed if left bone dry for too long. The goal is to keep the soil "moderately moist," like a well-wrung-out sponge.
Please do not water me simply because it is "Tuesday." The frequency with which I need water changes constantly based on factors you control and others you do not. The only true way to know if I am thirsty is to physically check my soil. Insert your finger about 2 inches into the potting mix. If the soil at that depth feels dry, it is time for a drink. If it still feels cool and slightly damp, please check again in a day or two. This simple act is the most direct way to understand my needs and is far more reliable than any predetermined timetable.
My water consumption rate is heavily influenced by my surroundings. During the long, bright days of spring and summer, I am in my active growth phase. With more sunlight and warmer temperatures, I am photosynthesizing vigorously and drawing more water from my soil. You will likely need to water me more frequently, perhaps once a week or so. Conversely, in the fall and winter, my growth slows dramatically. With shorter days, weaker light, and cooler indoor temperatures, I use far less water. During this dormancy period, I may only need water every two to three weeks, or even longer. Other factors like low humidity, which is common in heated homes during USA winters, can dry my soil faster, while a plant placed in a humid bathroom might need less frequent watering.
Getting my watering wrong has immediate and visible consequences. If you overwater me and my roots sit in water, they will begin to rot. You will see my leaves turn soft, mushy, and dark brown, often starting at the base. The entire plant may become limp and lose its structural integrity. This is a serious condition. On the other hand, if you underwater me, my stress response is to conserve resources. My leaves will lose their vibrant green hue, becoming pale and dull. The tips will turn brown and crispy, and my normally arching leaves will become weak and floppy. While I can recover from under-watering more easily, consistent neglect will stunt my growth and prevent me from producing my beautiful plantlets, or "spiders."
When my soil is dry to the touch, please water me thoroughly. Use room temperature water, as cold water can shock my root system. Water slowly and evenly over the soil surface until you see water begin to flow freely from the drainage holes at the bottom of my pot. This ensures the entire root ball has been moistened. It is absolutely critical that my pot has these drainage holes and that I am never left standing in a saucer full of excess water. After watering, always empty the saucer. This single practice is the best defense against the root rot I fear so much.