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Winter Tree Watering Necessary During Drought Conditions

“Adding winter water to your trees now is the best way to ensure optimum health and vigor for the growing season,” Urbina said. “Overly dry trees become susceptible to root and branch die-back, and subsequent insect and disease problems.”

SOUTHWEST COLO. – February 13, 2020 – Despite lots of snow falling in many regions of Colorado recently, much of the southwest area of the state is currently experiencing some level of drought, according to the National Drought Mitigation Center. Trees in community settings throughout this area are dormant now, but still require occasional watering during dry winters to remain in top health.

Vince Urbina, urban and community forestry manager for the Colorado State Forest Service, says both established and recently planted trees in Colorado – especially at lower elevations – often require additional watering in the winter months during extended dry periods (i.e., more than two weeks without lasting snow cover).

“Adding winter water to your trees now is the best way to ensure optimum health and vigor for the growing season,” Urbina said. “Overly dry trees become susceptible to root and branch die-back, and subsequent insect and disease problems.”

The CSFS offers the following winter watering tips:

  • Water when it is warm. The best time for winter watering is on days when snow has melted off and the temperature is above 40 degrees.
  • Water a wide area. Tree root systems may spread much wider than the height of the tree, with most absorbing roots in the top foot of soil. Apply water to soak the entire area underneath the full span of a tree’s branches.
  • Water slowly. To ensure deep penetration, use a drip or soaker hose on a low setting (or soft spray wand) to apply water slowly to the full area at the rate of 10 gallons per inch of tree diameter.
  • Retain mulch. To retain soil moisture and save water, apply 4 inches of organic mulch onto bare soil within 2 to 3 feet from the base of the trunk, but not directly against the trunk.
  • Repeat as necessary. Until spring precipitation arrives, be sure to continue watering every few weeks in the absence of snow and colder temperatures.

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