I have a rose bush that started out yellow with a light pink stripe, then it didn't bloom the second year. On the third year, it is now dark pink, almost a deep red. What has happened? The name is David's something.
Roses Changing Color
Most rosebushes are grafted rosesbushes. The top part being the rose that we bought and desired in our garden or rose bed. The bottom part is called the root stock, it is from an entirely different rosebush that is far more hardy. Thus the rosebush is able to survive better in most climates. When the top part that we desired dies for some reason, the root stock sometimes takes over and will send up its new shoots or canes. The bloom we have then is the bloom of the rootstock and the rose we originally desired is gone. Here is a link to an article about grafted and Own Root roses for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/own-root-roses-grafted-roses.htm