As temperatures drop across the Verde Valley, Sedona, Camp Verde, and Flagstaff areas, one of the most important steps homeowners and property managers should take is properly shutting down their irrigation systems for winter. Failing to do so can lead to costly damage that often isn’t discovered until spring.
At Green Earth Landscaping, we see freeze-related irrigation failures every year—and most of them are preventable.
Why Winter Irrigation Shut-Off Is Critical
Northern Arizona winters bring freezing overnight temperatures, even when daytime highs seem mild. Water left inside irrigation lines, valves, or backflow devices can freeze, expand, and crack components.
Common freeze damage includes:
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Broken PVC or poly irrigation lines
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Cracked valves and manifolds
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Ruined backflow preventers
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Damaged drip emitters and fittings
These issues often stay hidden underground until the system is turned back on in spring—when leaks, pressure loss, or flooding suddenly appear.
When Should Irrigation Be Shut Off?
In most of Northern Arizona, irrigation systems should be shut down before the first hard freeze, typically:
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Late October to early November in higher elevations
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Early to mid-November in the Verde Valley
If nighttime temperatures consistently drop below 32°F, it’s time to act.
What a Proper Winter Shut-Down Includes
A correct irrigation shut-down involves more than just turning off the controller. At Green Earth Landscaping, a professional winterization typically includes:
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Shutting off the main water supply to the irrigation system
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Draining irrigation lines and valves
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Protecting or insulating exposed components
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Shutting down and programming controllers for winter mode
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Inspecting backflow devices and above-ground piping
Skipping steps—or relying solely on the controller—can still leave water trapped in the system.
Why DIY Shut-Downs Often Fall Short
While some homeowners attempt to shut off their systems themselves, common mistakes include:
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Leaving water in low spots or valves
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Forgetting drip lines and pressure regulators
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Not protecting backflow assemblies
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Turning off the controller but not the water source
These oversights can result in repairs that cost far more than a professional shut-down service.
How Green Earth Landscaping Can Help
Green Earth Landscaping provides professional irrigation winterization services designed specifically for Northern Arizona’s climate. Our experienced technicians understand local conditions and system layouts, helping prevent freeze damage and ensuring your system is ready for a smooth startup in spring.
Whether you manage a residential property, HOA, or commercial site, proper winter irrigation care protects your investment and avoids unnecessary repair costs.
Schedule Before the Freeze Hits
If your irrigation system hasn’t been shut down yet, now is the time. Early scheduling helps ensure your system is protected before temperatures drop.
Contact Green Earth Landscaping to schedule your irrigation shut-off or to ask questions about winter irrigation care. We’re proud to help Northern Arizona landscapes stay protected year-round.
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