For Calgary homeowners, the irrigation season follows a predictable calendar from spring startup in May to fall blowout in September-October. Understanding the full seasonal arc helps you book services at the right time, program your controller appropriately, and avoid the most common seasonal mistakes.
Calgary Irrigation Season Calendar 2026
| Month | What to Do | Key Risk |
|---|---|---|
| March-April | Book spring startup for May; order any replacement heads if needed | Ground still frozen — do NOT start early |
| May (startup) | Professional startup; head walk; program spring schedule (3x/week, 12 min/zone typical) | Late frost possible — May 1 is safe start date |
| June | Increase run times as temperature rises; watch for dry spots | Calgary Stage 1 restrictions may begin |
| July (peak) | Maximum run times; 4x/week, 15-18 min/zone; daily for new sod | Stage 2 restrictions possible — know your watering days |
| August | Book fall blowout NOW — September books quickly | Late bookers face long waits or no availability |
| September | Reduce run times 30-40%; professional blowout scheduled | First frost risk from Sep 20 onward |
| Oct 1 Deadline | System blown out and shut off for winter | Hard frost risk — pipes can freeze if not done |
| October-April | System dormant; controller off or in winter mode | No risk if properly winterized |
Book Your Calgary Fall Blowout — September Slots Available
J.G. Irrigation — Calgary Irrigation Services
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