Mums should be watered whenever they need it, which means checking the soil daily for dryness. In some climates, this may mean watering every day, while in others, watering weekly might suffice. Mums like moist but not saturated soil; potted mums typically need water every other day or even daily during dry spells, whereas garden-planted mums might only require watering about once a week. The best time to water mums is early in the morning to allow better water absorption and reduce the risk of fungal problems. Watering should focus on the roots, not on wetting the foliage, to prevent disease.