The right technology for the right application can save a lot of water and increase the heath and growth-rate of plants.
Available options for landscape irrigation have greatly expanded in recent years. In addition, the already popular technologies such as automatic sprinkler systems have become very sophisticated and efficient.
A one-size fits all system is a thing of the past. A truly efficient and sustainable irrigation system can put to use several pieces of irrigation equipment to maximize water efficiency. For example a system could include computer controlled sprinklers for grassy areas, direct to root drip irrigation for shrubs and trees and incorporate rainwater harvesting systems like cisterns.
For even more sustainability and savings a additional water source called greywater recycling could also be employed. By using the best systems together a household can greatly reduce the water used for their landscape AND have even healthier plants.