Improve the existing soil by adding large amounts of organic matter like compost or humus. By all means, plant on raised beds for good drainage. Before planting bare-root roses, soak the roots overnight. Trim off any broken roots and prune the tips of any branches which may have been damaged. Roses need five to six hours of direct sun each day.
Morning sun is essential, but afternoon shade is tolerated.
Good air movement helps the dew and rain dry quickly, thus discouraging disease. Avoid planting under eaves or gutters where bushes can be damaged by falling water. Plant your roses where they are easy for you to watch and enjoy. This will also keep you aware of any insect or disease problems. Dig the planting hole large enough and deep enough to accommodate all of the roots without crowding them.