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When Is It Safe to Start Using Sprinklers in Denver?

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Tips For Protecting Your Plumbing & Enjoying The Best Lawn Ever

Spring in Denver brings unpredictable weather, with warm days followed by surprise snowstorms. Knowing when to start using your sprinkler system can help protect your pipes, conserve water, and keep your lawn healthy. So how can you know when the time is right? The experts here at Southside Plumbing are here to help.

Do you have any questions about your sprinkler system or outdoor plumbing? Our team is always here with the answers you need. Send us a message online or call 303-346-8426 anytime!

Best Time to Turn on Your Sprinklers in Denver

Believe it or not, in Denver the last snow often falls in May.  Southside Plumbing feels the safest time to start using your sprinklers is typically mid to late May, once the risk of hard freezes has significantly decreased. However, late-season cold snaps are common, so it’s essential to check the forecast before turning your system on. If you have your system on and find out an unexpected blizzard is on the way, it's important - however frustrating - to attempt to re-winterize your system to avoid any damage the cold could bring.

Factors to Consider Before Turning on Sprinklers

Consistent Above-Freezing Nights – Ensure overnight temperatures are regularly above 32°F.
✅ Soil Moisture Levels – Denver’s spring snow and rain often provide enough moisture to avoid turning your system on too early.
✅ City Water Restrictions – Many local water municipalities like Highlands Ranch Water implement summer watering restrictions; be aware of guidelines before setting your sprinkler schedule.

Spring Sprinkler Startup Tips

  • Inspect Your System – Check for leaks, cracks, or broken sprinkler heads before use.
  • Slowly Turn on Water Supply – Prevent pressure surges by gradually opening the main valve.
  • Adjust Sprinkler Timers – Set watering schedules based on your local water municipalities watering guidelines, which often limit daytime irrigation to prevent evaporation.
  • Be Prepared for Late Freezes – If temperatures drop unexpectedly, turn off your system and drain any above-ground components.

Protect Your System & Save Water

Rushing to start using sprinklers too early in Denver can lead to frozen pipes and costly repairs. Waiting until mid to late May and monitoring the weather ensures your irrigation system stays in top shape while conserving water. If you ever run into any issues with your outdoor plumbing, call on your trusted team at Southside Plumbing!

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