Schedule Winterization – Quick & Easy
Protect your irrigation system before freezing temperatures arrive
To protect your irrigation system from costly freeze damage, proper winterization is essential before the first hard freeze.
Here is a table detailing the first freeze dates for the Douglas County area.
| Earliest Date of First Freeze |
|---|
| September 8, 1962 |
| Latest Date of First Freeze |
| November 15, 1944 |
| Average Date of First Freeze |
| October 7th |
| First Freeze Recent Years |
| 10/22/2025 |
| 10/30/2024 |
| 10/14/2023 |
| 10/13/2022 |
| 10/10/2021 |
| 09/09/2020 |
| 10/05/2019 |
Schedule Winterization – Quick & Easy
Watering in October? Read This First.
Some homeowners choose to continue watering into October. In certain conditions, this can be beneficial—but it requires caution.
If you plan to water late into the season:
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We recommend wrapping the backflow preventer with insulation and covering it with a plastic bag secured with tape.
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This can offer limited protection, but it is not a guarantee against freezing damage.
The only reliable way to fully protect your system is to winterize before freezing temperatures arrive.
Why Professional Winterization Matters
Improper blowouts—or skipping winterization altogether—can lead to:
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Cracked pipes underground
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Damaged valves and fittings
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Broken sprinkler heads
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Costly and avoidable spring repairs
Our team winterizes thousands of systems each year and understands how Colorado’s climate impacts irrigation equipment. The goal is simple: protect your system so it’s ready to perform next season.
Why Customers Trust Castle Rock Lawn and Sprinkler to Winterize Their System
⭐️⭐️⭐️⭐️⭐️
“Auggie winterized my system this morning. He was prompt, professional, explained exactly what he did, and took the time to answer my questions about closing the system for the winter.”
— Carolyn B.
⭐️⭐️⭐️⭐️⭐️
“Damion knew his stuff, advised me of the freeze damage I had, and cleared my zones the correct way.”
— Jon D.
2026 Pricing:
September 14-30
$125 up to eight zones, additional zones $5
October 1 – November 20
$125 1-3 zones
$150 up to eight zones, additional zones $5
Office: 720-398-9442