Roses come in a variety of species and colors, and most are tolerant to growing inside containers. More care will be required for roses grown in containers than in the ground, but with the proper planting and care, they should flourish. When selecting a rose to plant in a container, consider that the larger rose species such as climbers and large garden roses will never reach their maximum growth potential.
Select a container that is at a minimum 15 inches in diameter and has drain holes in it. Use plastic containers in cooler areas that are prone to frosts and freezes, as they will not crack as easily as clay. Use clay containers in warmer regions; they will keep the root system cooler throughout the hot days.
Add a 1-inch layer of pea gravel to the bottom of the container to assist in drainage. It also will help to keep the soil loose and not have it pack firmly to the bottom of the planter, allowing the rose bush to grow properly.
Mix a combination of 2/3 potting mix that drains well and 1/3 cow manure. Add a cup of perlite to the soil mixture and mix well. Add blood meal to the mixture and mix well again. Roses are heavy feeders, especially grown in containers, and this soil mixture will meet their growing requirements.
Fill the container 2/3 full of the potting mix. Remove the rose from its container and loosen the roots, if pot bound. Place the rose in the center of the container and fill in with soil around it. Pack the soil down firmly with by hand, being sure to plant the rose no deeper than it was originally growing.
Water the container until water drains from its bottom. Continue to water the rose on a regular basis to keep the soil moist. Stick your finger 3 to 4 inches into the container's soil. Water if the soil feels dry.
Situate the rose in an area that receives full sun throughout the day. They require six to seven hours of sunlight each day to grow best. Make sure the area receives moving air, to reduce diseases such as fungus. Roses will grow and bloom best if they grow in an area that receives high light conditions and is ventilated.