I obtained 'Ann Endt' from Heirloom Roses last year and she bided her time growing a little bit and basking in the summer heat. This year she is still a small plant, about a foot high and little more than that in diameter. Because her mature size is supposed to be anywhere from 3.5 to 6.5 feet, I'm expecting much more growth from her this year.
Named after a famous New Zealand rosarian, Nancy Steen wrote about her discovery of 'Ann Endt' in a 1966 book, The Charm of Old Roses. I hadn't run across this book yet, but I have ordered a used copy from Amazon and hope to review it for you soon. I have seen a quote from the book stating that the rose is also shade-tolerant, relating that "Even the partial shade of a tall purple birch does not seem to affect its free-flowering habit." She is also supposed to produce hips, a trait that I enjoy in roses and will take as an advantage. Suzy Verrier, expert on all things rugosa, wrote in Rosa Rugosa that this is "an interesting hybrid of R. Rugosa", but "neither widespread nor well-documented." Verrier herself did not provide a picture of the rose. ProfessorRoush didn't find much else written about 'Ann Endt', but maybe this blog will serve to help others find and grow this tough rose.