A DEEP watering should bring them back to life. Fertilizing will not help a wilted plant. Flowering
plants need more water. If you want to fertilize
just make sure you are supplying more phosphorus
than nitrogen e.g. 5-10-10 or 5-10-5 or 10-20-20 etc
With more nitrogen the plant will produce more foliage
and less flowers. Also the development of viable
tubers is compromised for next season.

Thank you,I was starting to wonder what I was doing wrong now. The flowers are extraordinary beautiful. This was my first year of growing them defiantly not my last.

Happy Gardening

Adair