Hi, Elaine,

As your dogwood was transplanted from the woods, it is not a named cultivar, and the genetics of any individual "wild" plant can vary. If the "blossoms" have always been the yellow described, then this is the genetic makeup of that plant. We assume that the bracts have been this color as long as the tree has been flowering, and therefore, no treatment would change the color.

You might be interesting in looking at our fact sheet on dogwoods, which you will find by clicking here. You will see that what we call flowers are actually bracts (specialized leaves resembling flower petals). All dogwoods go through a greenish-yellowish-white phase before the bracts open fully to white (or pink or yellow).

Thank you for your question.

Barbara