Colorado Lawn Winter Watering Tips:

• Water lawns and perennials during prolonged dry fall and winter periods to prevent root damage that affects the health of the entire plant.
• Water only when air and soil temperatures are above 40 degrees F.
• South and West lawn exposures are at the highest risk for winter injury.

Dry air, low precipitation, little soil moisture, and fluctuating temperatures are all part of the climate of the Front Range of Colorado. This winter we are seeing a pattern similar to last year. We have had some snow, but it has been low in moisture content and the warm days are causing serious drought stress for plants. Trees, shrubs, perennials and lawns can be damaged if they do not receive supplemental water.

In addition to drought injury, lawns are experiencing an increase in lawn mite activity. Mites damage the yard by sucking moisture out of the roots and blades of grass. When you couple this moisture loss with the drought conditions we are having, it is a “perfect storm” for serious damage to turf and other plantings.

Sensitivity to Drought Injury
Lawns are prone to winter damage. Newly established lawns (whether seed or sod) are especially susceptible to damage. Susceptibility increases for lawns with south or west exposures because of higher mite activity and quicker snow melt. In addition, the south and west exposures become drier because of sun exposure and warmth. These areas in particular need supplemental winter watering.

Watering Guidelines
Water only when air temperatures are above 40 degrees F. Apply water at mid-day so it will have time to soak in before possible freezing at night. Do not let a layer of ice persist on the lawn. If an ice coating develops, discontinue watering in that area until the blades of grass are fully exposed to the elements again.

Another major problem area for lawns comes from reflected heat. Lawn areas receiving reflected heat from buildings, walls and fences are more subject to damage. The low angle of winter sun makes this more likely in south or west exposures; however, east facing walls, fence lines and large windows can also cause scorching of grass and an increase in mite populations because of the warmth the reflected sunlight creates. Windy sites result in faster drying of sod and plants and require additional water. Lawns in warm exposures are prone to late winter mite damage. Water is the best treatment to prevent turf injury.

Monitor weather conditions and water during extended dry periods without snow cover – one to two times per month.