Keep it healthy
Use loam-based composts for plants in longterm containers. They ensure the pot won’t dry out too quickly and will hold nutrients well. Keep on top of watering, checking your rose regularly, particularly in summer. Compost should be moist but not saturated. Raise pots up onto bricks or pot feet so that excess water can drain away easily. Mix a dose of granular rose feed into the compost at planting. Each spring sprinkle more into the surface of the compost. Feed every couple of weeks through the summer with a balanced liquid feed to keep the leaves healthy and promote flowering. Keep an eye out for aphids, as roses in pots are more vulnerable to pest attack. Squish them off with your fingers. Alternatively, there are sprays available. Top-dress your rose every other year in spring by removing the top 5cm of compost and replacing it with a fresh layer. Re-pot larger shrub, bush and climbing roses every two to three years into a pot bigger than the last and filled with fresh compost.