Once the plant has fully bloomed, it is not necessary to water it every day. It must be watered every 3-5 days. If you stop watering it for too long, it will turn into a Whitered Plant. If you do not water it within approximately 2 days, the plant will die and only an Empty Flower Pot will remain.
If you use an Ice Flower Seed in a pot, Seeds on any fully grown plant, it will never need to be watered and the plant will never die.