Plants that receive an inadequate supply of potassium are often more susceptible to frost damage. Improved resistance to frost is attributed to a number of physiological and morphological factors such as healthy deep roots, large xylems vessels, high contents of sugars and carbohydrates, reduced transpiration and water loss. Potassium acts on most of these factors thus reducing winter injuries.

Plants adequately supplied with potassium can utilize soil moisture more efficiently than potassium-deficient plants. Potassium boosts a plant’s tolerance to drought by stimulating enhanced water uptake by plant’s roots and reducing the loss of water through transpiration.