The controller operates only one zone at a time to insure that there is adequate pressure for effective watering. In general, it is best to water right after midnight for maximum water pressure and less wind. Each sprinkler head covers an area up to 5,000 sq. When one area is done, snap the hose on to another sprinkler head. Individual hose-end sprinklers are also effective for watering entire lawns or individual shrubs and areas.
Several companies offer battery-powered timers that are screwed on to a faucet before the hose.
With simple calculations, you can set the on-time to provide the proper amount of water. You will see many different design types at your home center store because each has a specific watering application. If you try to use one design of everything, you will just waste water. Oscillating ones are good for rectangular areas. Use rotating or stationary types for small areas.