In general, daisies can survive for about a week without water. However, if the weather is hot and dry, they may only last for a few days. If the soil is moist, the daisies may be able to survive for a longer period of time.
To help your daisy survive, make sure to water it regularly, especially during hot and dry weather. The best time to water daisies is in the morning or evening, as this will help to prevent the water from evaporating too quickly. You should also water the daisies deeply, so that the water can reach the roots.
If you notice that your daisy is wilting, it is important to water it immediately. If the daisy is severely wilted, you may need to cut it back to the ground. With proper care, your daisy should be able to recover and bloom again.