Generally, you want water to reach everywhere within the plant's root zone, which may be as deep as 18 inches and as wide as the crown of the plant. Get to know your soil and how water penetrates and travels within it. If the soil around your rose is dry to a depth of 4 inches, you should definitely water, but it's best not to let it get that dry. Water roots, not leaves. Wet leaves encourage some fungi, so avoid wetting them unless you are washing off dust or aphid infestations with a hose.
Drip irrigation is better for watering roses than sprinklers.
Fertilize correctly neither too much nor too little. Rose plants that are either under-or overfedwill be more susceptible to problems. One simple method is to buy a fertilizer packaged for roses and to follow the label directions. Different kinds of roses need different kinds of pruning. At that time, remove any dead branches or twigs, as well as branches that crowd the center of the plant.