2021 Deep Water Trees & Shrubs

2021 Deep Water Trees & Shrubs

Landscape & Garden    Treasure Valley

Posted on: August 31, 2021 by Nic Usabel

Many irrigation districts across the Treasure Valley have indicated that water delivery will end early this season. If your irrigation season will end soon consider deep watering your trees and shrubs before irrigation delivery has stopped. 

For established trees irrigate trees starting halfway between the trunk and the dripline  and extending well beyond the dripline. See photo linked below for a visual. For large trees this could encompass the entire lawn. For newly planted trees irrigation is best concentrated near the trunk and slightly beyond the root ball to encourage roots to move out into the surrounding soil. Shrubs can be watered in a similar fashion to ensure the roots of the shrub have received water. Evergreen trees and shrubs will continue to lose moisture from their needles or leaves all winter long.

Consider using mulches on the soil surface to conserve moisture. In addition, it will help with weed control and uniform soil temperature. Keep mulch 2 inches away from tree and shrub stems to discourage root and crown disease. 

References:

• Tree for southwestern Idaho landscapes: Selection & Irrigation, University of Idaho
  
• Watering Home Lawn and Landscapes, University of Idaho

» Tree Dripline Image