Answer: Most roses do best in a large container that allows ample room for their roots and also helps insulate the soil against temperature swings; larger containers are more easily kept moist during the summer, too. You might try a half barrel or similar sized container, but in any case nothing smaller than a five gallon bucket or pot. The smaller the container the smaller your plant will be, so it is better to go with the biggest one you can. The soilless mixes work well in containers because they are formulated to hold water as well as air. Some gardeners will add a bit of compost to that, and some will add a water holding polymer to try to reduce watering needs during the summer. You will probably want to repot the plant annually to refresh the mix and also follow a regular program of fertilizing.
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