I just moved in to a house about a month ago. I have 2 very neglected rose bushes. One looks really good ( I have not hardly touch this one) and the other is in terrible shape. I have to admit that I have had to cut on this one alot because it is next to the walk way. I have dead headed and cut some of the really long canes to the top of the rose bush but the canes that I have had to cut do to the fact that they were so long have now turned black on the ends. As I was really looking at the plant I have noticed that it is really sick looking. The leaves are looking wilted and dried up. I put water on it for about 30 minutes today. But I am not sure how long to water. we have very sandy soil which is new to me. I just in general need help with how to care for my rose bush.