Then fill up the rest of the hole with the remaining soil and gently press down. Slowly pour water over and around the base of the plant or until it pools on top of the soil. If the water is running away from the plant and not soaking in, make a one inch-high wall of soil around the circumference of the plant about one foot from the center. This will keep the water from running away and allow it to soak in around the plant. The most important thing you can give your new rose is water.
Water settles the soil around the roots, and helps the roots transport nutrients to the plant.
Place mulch around the base of the plant about three-inches thick. Mulch reduces moisture loss, adds organic matter, suppresses weed growth and keeps the feeder roots of your roses cool. Newly planted roses are very vulnerable to heat and dry weather, so shelter them from wind and keep them well watered so they don't dry out. If your plant is bareroot, mound up soil over the crown of the plant to about six-inches high so that at least two inches of the canes show above the soil. Keep the soil there for about two weeks it will help keep the newly planted rose from drying out and protect the emerging leaf buds from wind and temperature extremes.