The difference between a lawn sprinkler system and a micro-irrigation system is the following:
A sprinkler system is designed to deliver a large amount of water during a set period of time. This method often results in water run-off and overspray. At times, it may seem that the surrounding pavement actually receives more water than the intended plants.
In contrast, spray heads installed in a micro-irrigation system are designed to deliver less water at more frequent intervals, allowing water to spread slowly in a more lateral flow. The spil maintains a more uniform level of moisture, lessening the possibility of root rot. Micro-irrigation systems are best used for hanging plants or deck/window flower boxes.