Even with regular watering, my Shasta Daisy is wilted all the time. It gets both sun and shade. It is a new plant-bought 4 weeks ago. We are having lots of heat-in the 90's every day.
Certified GKH Gardening Expert
New plants and very high temperatures will require extra water to keep them alive.
Is the soil draining to quickly for the moisture to be held? Or is the plant receiving to much water? This could also be indicated by wilting.
Here is a great article that should help you pinpoint the issue.