Six years ago, we built in the country and I have been landscaping with a variety of shrubs. About the second year they are in, some will start to develop stunted leaves as new growth which stay stunted all year. The stems become swollen (knobby round growth) where the branches come out. Very few flowers will appear, if any. After a couple of years, most have died. This has affected my blueberry bushes, red twig dogwood, lilac and forsythia. I thought the forsythia bushes were going to make it as they are fairly large and are now 5 years old but this spring, they did not bloom at all.