I have 5 lilacs in my yard. Three in the front in full sun, one on the side in
part shade and one in the back in part sun. All but the one in the back are two
years ago. The one in the back is about ten years old. For some reason they are
all almost the exact same color (light blue). The ones in the front are supposed
to be a purple, a peacock and a red. The one on the side should be a purple and
the one in the back has been light blue as long as we have lived here. What
could be causing this, other than the plants themselves being mis-marked at the
nursery.