Many houseplant owners traditionally reduce watering in winter, often rationing water based on the calendar. This practice stems from the understanding that most houseplants slow their growth and use less water as light levels decrease, making them susceptible to root rot if watered excessively.
However, this rule is frequently misunderstood. While the principle of reducing water is valid, the key is to observe what each plant is doing, rather than adhering to a strict seasonal schedule. For example, a plant in a cooler, dimmer room may dry out more slowly and require less water, while a plant under a grow light in a warm room might continue growing and need more frequent watering.
To determine watering needs, it is recommended to research individual plant dormancy and check the compost moisture by pushing a finger a few inches in, or by lifting the pot to assess its weight.