Definitely NOT sterile, although it has very much reduced fertility compared to the three species that went into it. Most of the flowers drop without leaving any hips, but the velvety smooth hips that do form typically have from 1 to 4 seeds each. And they're a joy to work with compared to the prickly hips of two of its siblings. This is probably my favorite of the four siblings that I've kept all these years. It has the healthiest foliage and has also occasionally had a few scattered repeat blooms.