Water bromeliads well and allow the soil to dry before watering again. Many bromeliads hold water in a leaf cup called a “tank.” The tank should be kept filled with water at all times. Be careful when you fill the tank, not to let the water soak the soil. Bromeliads are prone to root rots if the soil is kept wet. Flush the tank periodically by pouring fresh water into it, inverting, and filling again. This will prevent stagnation and buildup of mineral salts.