Cooler temperatures and shorter days mean your landscape doesn’t need as much water as it did during the heat of summer. Plants are growing more slowly, less water is lost to evaporation and many plants are beginning to go dormant. Before winter arrives, take a few simple steps to conserve water and protect your landscape and irrigation system.
When Should You Turn Off Your Irrigation System?
Now that it’s October, consider turning off your irrigation system so plants can begin going dormant for the winter. Northern Colorado’s first freeze can arrive quickly, so don’t wait to winterize your system.
Simply turning off your irrigation controller may not be enough to protect it. Water left in pipes, valves, sprinkler heads and other components can freeze and expand, potentially causing damage.
Winterize your irrigation system properly. Depending on the system, this may include using compressed air to remove remaining water. If you’re unfamiliar with the process, consider hiring an irrigation professional. Improper winterization can also damage system components.
Remember Your Trees and Shrubs
Shutting down your irrigation system doesn’t necessarily mean you’re finished watering for the year. Colorado can experience extended dry periods during fall and winter, and trees and shrubs may benefit from supplemental water. Newly planted trees and shrubs, evergreens and plants in exposed locations can be particularly vulnerable to winter drought.
During dry periods, consider deep watering trees and shrubs. Apply water slowly over the root zone so it penetrates well below the soil surface. For established trees, spread water across the area beneath the canopy rather than concentrating it around the trunk.
For winter watering, choose a day when the temperature is above 40 degrees, the ground isn’t frozen and there is no snow cover. Watering around midday gives moisture time to soak into the soil before nighttime temperatures drop.
Fall and Winterization Checklist
Before putting your landscape to bed for the season:
- Reduce irrigation as temperatures cool and plants need less water.
- Check trees and shrubs for dry soil.
- Winterize your irrigation system before damaging freezes occur.
- Disconnect and drain garden hoses to protect hoses and plumbing.
- Monitor trees and shrubs throughout the winter, especially newly planted trees and shrubs and evergreens.
A little preparation this fall can help protect your irrigation system, conserve water and keep your landscape healthy and ready for spring.
