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How-To Guide

How to Winterize Your Irrigation System & Garden Tools

Mild San Diego winters rarely need pipe blowouts. Turn irrigation down or off for rains, add a rain shutoff, and store tools dry.

Irrigation system and tools ready for rainy season

Rain Season Ready

UC guidance for California often means shutting irrigation during the rainy season (commonly Nov–Mar), testing valves, and protecting hose-end timers — not freeze-climate compressor blowouts.

Irrigation system and tools ready for rainy season

Materials Required

  • Controller access / app
  • Rain shutoff sensor (retrofit if missing)
  • Filter wrench / spare screens for drip
  • Tool oil, sharpening stone, dry storage

Step by Step

  1. Cut or pause irrigation for rains

    Turn controllers off or sharply reduce runtimes when storms arrive. Manually test each valve before you walk away for weeks.

  2. Install or test a rain shutoff

    A rain sensor stops scheduled runs after rainfall on most systems.

  3. Service drip filters and ends

    Clean filters, flush line ends, and map zones so spring repairs are faster.

  4. Store hose-bib timers indoors

    Remove batteries from hose-end timers and keep them dry between seasons.

  5. Clean and oil tools

    Brush soil off, sharpen blades, oil pivots, and hang in a dry spot. Sandy coastal air still corrodes.

San Diego Tips

  • Even in winter, new plantings and some natives may need occasional water in dry spells — check soil a few inches down.
  • Full pipe blow-outs are mainly for freeze climates; coastal San Diego focus is off + rain sensor + tool care.

Want help getting this done right? Gardens of Gold designs and installs water-smart landscapes across San Diego County. Get a quote.