48+ What Causes Brown Leaves On Roses. In many cases, the causes are specific to the type of tree. The combination of yellow leaves and brown spots on roses can occur for a number of reasons, including nutritional problems, watering and drainage inappropriate watering may cause leaves to yellow and develop dead, brown areas, whether the roses receive too much or too little water.
This can be caused by too much sun so, if you think that applies, try moving your plant to a shadier area.
This spring, the leaves have dark spots on them and reddish veins running through the leaves. The most common reason that plants' leaves turn yellow is because of moisture stress, which can be from either over watering or under watering. Brown spots on rose bush leaves are among the most common problems encountered by gardeners. They cause leaf yellowing and the overall weakening of the plant.