Watering is the most important aspect of keeping roses healthy. Rose roots can reach up to a foot and a half deep, and they don't like to dry out. Instead of watering often but shallowly, give roses regular deep waterings slightly less frequently.
Many gardeners use flood basins, drip irrigation, or soaker hoses. Avoid overhead watering if possible; wet leaves can lead to fungal diseases.If you live in a dry-summer area, though, you may want to sprinkle the leaves to remove dust and dirt. Do so early on a warm and sunny day so the leaves will dry out before evening.
Container roses will need to be watered more often, particularly if the weather is hot and windy. For both container and in-ground roses, mulch can help retain moisture. If your ground does not freeze in winter, you will need to water if there are no winter rains.
