Summer is in full swing now and the weather is getting hot. Your lawn must be getting thirsty and will need to be watered daily, right?
If you did water your lawn a little bit each day, that is actually likely to stress your grass out more over time. Frequent but shallow irrigation prompts the root system to form closer to the surface. If a spell of drought and/or hot weather hits, the soil is likely to dry out and the grass could start to show signs of stress and even die if the problem lasts long enough.
Deep Watering Is Best
Deep watering your lawn as needed will cause the moisture to move down further into the soil. The roots will follow and reach down into the ground where there is not as much evaporation. If the weather is dry, there is now an extensive root system that will allow your grass to have a better chance of finding water and surviving.
You do not want to just crank up your sprinklers and let them go all day, however. Your ground will have a certain infiltration rate (how much it can absorb at a time) based on your type of soil (clay retains water very well and too much will not be taken up, for example), level of thatch present and other factors. Cornell University suggests that you can figure out what the rate is in your yard with the help of a coffee can that has had both ends removed. You would observe how long it takes for 1″ of water to drain, then note the length of time needed to fill it 1″ where the sprinklers hit.
You can use your infiltration rate to determine how long your sprinklers will need to be going. On average, lawns in New York need to replace 1″ of water a week, says Cornell University. If it rains one week, you may not need to do any watering at all.
Give your lawn a better foothold by using deep watering instead of shallow daily irrigation. Give us a call if you need help to figure out your infiltration rate or adjust your sprinklers.
Image by FredericRivollier under a Flickr Creative Commons Attribution License