Stunted, wilting and dying plants.
Is anyone else seeing these problems? Earlier in the year, I had several stunted, deformed plants--Purple Coneflower, White Swan and Baby Swan Coneflowers, and Butterfly Weed--which I dug up and destroyed. Now my Early Sunrise Coreopsis and Blue Mirror Delphiniums are starting to yellow and wither. Any ideas what might be causing this? All of these are normally very hardy plants that grow well in my garden. I've been watering on a regular basis, so I don't think that's the problem. Am I dealing with a pest or a disease?
Thanks for your help.