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| Courtesy: Denver Water |
Trees and shrubs need a little extra water to get through prolonged dry periods.
Tree roots are not like carrots.
- Tree root systems can spread two to four times wider than the height of the tree. Most of the tree's absorbing roots are in the top 12 inches of soil.
Water deeply and slowly.
- Apply water so it moistens the soil in the critical root zone to a depth of 12 inches. Water with a deep root fork, soaker hose, five-gallon bucket or soft spray wand. Apply water to many locations under the drip line. If you use a deep root fork or needle, insert the device no deeper than eight inches into the soil.
How much water to apply.
- April through September: In normal precipitation years, trees located in irrigated turf areas do not need additional water.
- When watering restrictions prohibit turf watering, or when trees are not in turf areas, water small trees four times per month, medium trees three times per month and large trees two times per month.
Mulch helps retain soil moisture.
- Mulch helps conserve soil moisture. Apply organic mulch within the drip line, at a depth of three to four inches. It is best to eliminate turf prior to adding mulch. Leave a six-inch space between the mulch and the tree trunk.
Moisture is needed to help avoid disease.
- Maintaining consistent soil moisture allows for better water absorption. Stressed trees are more vulnerable to disease, insect infestations and branch dieback.