First, Sprinklers with Automatic Timers…
No one can argue that the convenience of in-ground sprinkler systems sure beats the alternative of taking the time to haul hoses and sprinklers all around the property and constantly monitoring their use. The problem is not with the system itself. The problem is having them set to go off every 2 to 3 days automatically, even if it’s only for 15 to 20 minutes per zone.
We tell folks all the time that properties displaying the healthiest, greenest lawns in June, July and August have the most issues with trees and shrub health. So why is that?
Where lawns can handle frequent watering, your trees and shrubs certainly can’t. Watering lawns every few days causes the soil and clay beneath it to be in a constant state of wetness. The grass above insulates and shades the soil and as such, it takes soil much longer to dry out. When soil is wet, much needed oxygen is impeded from reaching the roots. While this situation is occurring, roots start to suffocate causing a condition known as root rot. Over the years more and more roots die off causing the tree to get weaker and weaker, making it easier for insects and fungus to attack it, and can lead to the death of the tree.
If you have a sprinkler system, we strongly suggest to turn off the timers. Your property is much better off being watered no more than every 7–10 days for an hour or more per zone, allowing the water to seep deeper into the ground and then allowing it to dry out. Your grass may not be quite as green, but your trees and shrubs will be much healthier and happier in the long run.
