Hello. If you think it is necessary (if you identified unusual symptoms on the leaves in the previous growing season or you suspect the risk of fungal diseases), you may consider a preventive copper treatment with a fungicide such as , according to the instructions in the product description. It is recommended that the treatment is carried out on days with positive temperatures (preferably above 5℃), without strong wind or precipitation. More information on how to apply plant protection treatments in optimal conditions can be found in our article: Phytosanitary treatments - environmental and labor protection.
During the growing season it is recommended to take proper care of the roses and fertilize them with specific products: foliarly (e.g. or ) and at the roots (e.g. ). Fertilizers are always administered according to the product description. More information on the care of this plant species can be found in our article: Roses, planting guide and care work.