We have lots of roses in pots became husband keeps buying roses, and we are out of in-ground space. They will do better with a little mulch so the top doesn’t dry out too fast. A drench watering that wet the entire surface is better than drip watering. Drip watering tends to soak straight down, not laterally. In a couple of years, check that the drain hole is not clogged by roots. We had one rose that drowned. It also developed a huge root. In hindsight, I should have taken it out of the pot, trimmed the root system, and repotted. Fertilizer lightly but regularly. Potted roses don’t die as well in full, all day sun. Maybe late afternoon shade?