How often is watering req. to roses & which is the bet pesticide to be used?

The amount and frequency of application will depend on soil type, bush size, and the rainfall in your area. When watering roses, be sure to soak the soil well; they need more than just light sprays of water. If you live in a dusty area, you will do you plants a great favour by washing off their leaves every week or so. This will also wash away some insect pests. Some other tips include watering in the morning, avoid letting the water come into contact with the leaves and blooms, and providing mulch so that the soil retains its moisture. The use of mulch around roses help to retain soil moisture and help retard weed growth. A mulch is any material such as wood chips, straw, or dry grass clippings. Decorative materials such as shredded hardwood bark or cocoa bean hulls or coconut husks could also be used. When applying any mulch don't pile up on the base of the canes, spread it around, about an inch of the base and should be applied about 2-3 inches deep and replaced as needed.