We have to start by taking note of the fact that there are several methods you can use to irrigate your lawn. To get to this point, you would first have acknowledged the fact that the grass in your lawn needs an adequate amount of water, if it is to look lush. You would then have monitored the natural precipitation patterns in the place where you have the lawn, and observed that the amount of water that your grass can get through natural precipitation is too little to make it grow optimally. This is what would make you start thinking of irrigating the place.

The factors you should take into consideration when selecting an irrigation method for your lawn would then include:

1. The amount of water you have available: certain methods of irrigating are rather wasteful (with respect to the amount of water used, vis a vis the amount of water actually needed). When you happen to be living in the parts of the world where water is a truly precious commodity, you certainly won't want to make use of one of these irrigation methods. On the other hand, there are methods of irrigating that tend to be very economical with respect to water usage. These tend to be quite expensive to implement. But if you are living in a place where water is hard to come by, you may have no alternative than to make use of them.

2. The type of grass you have planted: there are certain grasses that need a lot of water, if they are to look lush. There are others that don't really need a lot of water. The type of grass you have in your lawn will determine the amount of supplementary water you have to supply to it. The amount of water you have to supply (and how frequently you have to do so) will in turn determine the ideal irrigation method to make use of.

3. The natural precipitation patterns: there are places where the difference between the amount of water obtained by way of natural precipitation and the amount of water needed for the optimal growth of your grass is very little. In such cases, the amount of water you have to supplement by irrigating is small. Your needs, in terms of an ideal method for irrigating, would be quite different from those of a person in a parched part of the world, who has no alternative but to water his or her grass by way of irrigating.

4. The size of the lawn you are looking at: naturally, what would be considered to be an ideal way of irrigating a small lawn may not be the ideal way to irrigate a huge organizational lawn. An irrigation method that may have worked very well before when you were dealing with a small lawn may not work when you get a bigger lawn to care for. Therefore the size of lawn to be watered becomes an important consideration in selecting a method for irrigating it.