This section is from the book "How To Make A Flower Garden", by Wilhelm Miller. Also available from Amazon: The Well-Tended Perennial Garden: Planting and Pruning Techniques.
Concealing an unsightly bank by transforming it into a rose garden accomplishes several desirable objects. It "makes the waste places to blossom as the rose," and also affords the plants abundant light, air, and room, which they do not always get if planted in beds where room is of more value.
Pockets should be dug into the side of the bank and the turf brought forward and shaped into basins, as shown in the sketch. In this way all the wash from the bank will be collected around the roots. Climbing roses do particularly well if kept a little off the ground. In the North, where the winters are particularly severe, the bushes should be pinned back against the bank and covered with brush or leaves.