Keep the Ground Moist
Myers says there are no hard-and-fast rules for how much water to give or how often to water your roses. Watering depends on your soil conditions. For soils such as clay, that could require turning on the hose just once a week. If the soil is dry 4 to 6 inches under the surface, then it needs watering, Myers says. "The top of the soil dries out very quickly, so you have to see what's going on deeper." Keep the ground moist, but not soaking wet.
"Don't just water the plant; water all around the area so the roots will branch out," Myers says. "At first, check the soil every day, then every other day. You should get to the point where you soak the plants once a week, or if it's hot and dry, twice a week. Your goal is to have more drought tolerant roots, so train the roots to go deep into the ground for water."