I have a garden with a row of 12 stella doras. They were planted 4 years ago and have trhived each year. They were doing great this summer until our sprinkler system stopeed working. I didn’t realize that teh plants weren’t being watered until it was too late. Now the leaves are completely dried up. It is only September, so I don’t think this has to do with winter weather. Should I try to cut back the dead leaves and soak with water? Or, do you think these plants are dead?