This is about the third year we grow Princess May. Everytime the similarity with Kathleen Harrop strikes me!!
It is thornless, same leaves, same growth. The flower of the Princess is slightly darker and a little more filled. But that is only compared by cutting the branches from each variety and put them together. otherwise the small differences are not seen. I got if frome somebody in France. If this princess is the right one, it is for sure a sport of Kathleen Harrop or Zéphirine D.
Somebody has any ideas???