Irrigation systems are not necessary for maintaining the health of your lawn or plants, but can be helpful. Irrigation does much of the hard work that watering entails so that you don’t have to, and it hits the parts of your lawn you might miss. A hose and sprinkler can be a money-saving alternative, but require you to set timers and manually move the sprinkler around your yard. With either option, though, it’s easy to waste water. Ultimately, you have to decide if an irrigation system is right for you.