Mums (chrysanthemums) generally need to be watered whenever they require it, with the frequency depending on whether they are in pots or planted in the ground and the climate. Potted mums typically need watering every day or every other day, especially in hot or dry weather, because the soil in pots dries out faster. Garden mums usually need watering about once a week, ensuring the soil is kept evenly moist but not soggy. The best time to water mums is early in the morning to allow better water absorption and avoid fungal issues. The soil should be checked daily for dryness, and water should be applied when the top couple of inches are dry. Overwatering should be avoided to prevent yellowing leaves and rot.