The initial step is to select a container. It can be made of any material, but the most significant factor is the size. The roots of most bush roses require at least 18 inches of space, whereas miniatures require only 12 inches. A soil-based compost or, if weight is an issue, peat-based compost should be used. To allow for free drainage, the container must be raised on bricks. Small floribundas, landscapes, or tiny roses are usually the best tub roses.