Answer: Choose a large enough container, 5 gallon for small, 15-20 gallon for shrub roses and hybrid tea's. Container grown roses will require more frequent watering and fertilizing.
To a soil mix of one-half potting soil and one-half garden soil, you can add water expanded polymer crystals for moisture retention. Be sure the container has adequate drainage. Plan to replant the container rose every 3 years as the soil nutrients are depleted. Trim at least 2" off the root ball, then replant in the container with fresh soil. A half whisky barrel is great for shrub planting, but add wheels to move, they are heavy.
A bonus with container roses is that they can be moved about giving your deck or patio a "new" look.
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