I didn't get a response to this question so I'm asking again: I have a Cozy Pink Teacup Hybrid Dogwood, planted 4-5 years ago. At first the flowers were deep pink, now practically white. Is it a Ph problem? I planted in a spot where a large Cherry tree was for 30 years. I had that tree cut down and trunk grinded, but of course the roots have been decaying throughout the lawn.