I have a Europeana rose in a pot, half shaded. It has always done great (we live in S. Tx!); we inherited it and have had it for 6 years now. All of a sudden, this summer, its leaves became sort of limp and began turning brown at the tips and then all the leaflet. This spread from the bottom of the cane to the tip, and then the cane would die. It doesn't seem to have any insects in, no powdery mildew, black spotting, no mites... What can be causing that? I do water often since it is so hot here. There's only one cane left and the leaves are beginning to brown... What could be causing this problem, and what can we do? Thank you for your time.
It sounds as if you have covered the exposed areas of the plant so try digging into the soil to see if it is too wet or too dry. There may be malformations on the roots as well. Most states have agricultural extension services, so you could dig it up, pot it and take it to one of the extension services for inspection.
It is difficult to say what the cause is without seeing the plant and the environment it is growing in so you might take a photo of it in its location as well. Good luck!