Winter watering and our water supply

During extended periods of mild and dry winter weather, it’s a good idea to water your trees and shrubs once or twice a month when the temperatures are above 40 degrees.

Is it really important to winter water?

Yes. Watering trees and lawn areas in winter helps them stay hydrated through the winter (especially those that are sunny, sloped or exposed to high winds). Well-hydrated plants experience less winterkill. Use a hose-end sprinkler or watering wand and disconnect the hose from the spigot afterwards to prevent freeze damage.

Are Water Wise Rules still in effect?

Until May 1, you can run your sprinklers any time of day to prevent water freezing on concrete and creating a slipping hazard. The other Water Wise Rules are in effect throughout the year.

Given ongoing drought across the west, will winter watering jeopardize our water supply?

While there was a slow start to winter snowfall, snowpack in the majority of our mountain collection systems have rebounded to average conditions. System-wide storage is average for this time of year and winter watering is encouraged as a wise use of water to help keep our landscapes healthy. Learn more about our water supply and drought conditions.

Winter Watering Tips

• Water one to two times per month from November to April.
• It is most critical to water in March and April when the new roots are forming.
• Water at midday so it can soak in before it freezes.
• It is most important to water newly planted lawns, trees, shrubs and flowers.
• Use a hose-end sprinkler or watering wand and water slowly so it can soak in.