Southern California near coast
Rosenprinzessin possesses immunity to all disease both bacterial and fungal in my garden. I do not spray but use a soil systemic 1-3 times a year. It is now mid November and she is blooming again without additional fertilizer since mid spring. The only other disease free rose in my garden is the white form of Mlle. Cecile Brunner although Cornelia and a more modern hybrid musk that I have are very tough. Due to the costal influence my roses are exposed to black spot, rust and mildew when the conditions are right. She tolerates alkaline clay soil and alkaline water with a high concentration of minerals that are not rose friendly. Rosenprinzessin is shade tolerant and is doing well with about 1/2 day of sun. The deep pink color makes a nice accent in a garden with an English color scheme of paler hues. Growing about two feet tall in my frost free climate this rose would be ideal en masse in the forefront of a larger garden or as a patio type rose where space is restricted. I purchased this rose 2011-2012 from Vintage Gardens when they were selling EuroDesert Rose stock. It is unfortunate that Rosenprinzessin doesn’t seem to be commercially available as it would be an ideal addition to many gardens.

Available from - Roses Loubert
https://www.pepiniere-rosesloubert.com/catalogue,3/triomphe-avranches,994082.html