Without a doubt the most important element for any lawn is proper watering. If your lawn does not receive adequate irrigation it will become stressed and eventually die. There is a very basic formula to ensure your grass receives what it needs to thrive and be healthy. Watering deep and infrequently is the starting point. If you only put on your sprinkler for a short time much of the water is on the surface layers resulting in evaporation and water starved roots. The frequency of watering is of course based on the elements. The warmer it is the more frequent you need to water. At the most even in warm periods twice per week for Calgary is adequate. Keep in mind the best time to irrigate your lawn is in the morning.