The application of water colder than the ambient temperature to plants can induce a variety of physiological stresses. This occurs because plant roots are sensitive to temperature fluctuations. When exposed to excessively chilled water, the plant’s capacity to absorb nutrients and water is impaired, potentially leading to root shock and stunted growth. Furthermore, subjecting leaves to cold water can cause spotting or discoloration, particularly in plants sensitive to temperature changes. An example is tropical plants, which are naturally acclimated to warmer temperatures, being irrigated with ice water.
Mitigating temperature shock from irrigation is crucial for plant health and productivity. Avoiding extreme temperature differentials reduces stress, allowing the plant to efficiently absorb essential nutrients and water, which promotes robust growth and overall resilience. Historically, experienced growers have understood the necessity of using water that is closer to the soil temperature, employing methods like storing water in shaded areas to allow it to equilibrate to a suitable temperature. This consideration minimizes disruption to the plant’s physiological processes and supports consistent development.
