If you live in an area that has long dry seasons, you need to pick your trees wisely; choose the ones that can handle the drought. Keep in mind that under these conditions, the plants that usually survive for longer period of time are, usually, the native trees. These trees adapt well to the soil, as well as the climate of the region, since they are going to be more tolerant to drought than non-native trees. For example, you can check around your region for green trees. You can learn their names and you can buy these specific trees. These trees will probably have less maintenance and they will survive for many many years.
Growing drought tolerant trees can be a great way for you to make your landscape look more wonderful, while, at the same time, helping with water conservation and saving money on the water bill.