Unfortunately, Colorado’s winters are too cold to leave the automatic sprinkler system on, but too dry for lawns and many trees and shrubs
Without sufficient water, plants will die or be damaged. Therefore, it is necessary to continue watering after your sprinkler system has been winterized in the fall. If there is no rain or snow cover for four to six weeks you should water. Water in the morning on days when the temperature is above freezing and when the ground isn’t frozen so the water will be absorbed. Use a lawn sprinkler to water lawns and established trees. A soil-needle attachment on the hose works well for watering shrubs