Getting your Calgary lawn and irrigation system ready for winter is a 4-step process that every homeowner needs to complete before October 10. This complete guide covers everything from the final mow to the sprinkler blowout to fall fertilizer — so your lawn and system survive Calgary's winter in the best possible condition.
Calgary Pre-Winter Lawn + Irrigation Checklist
| Task | When to Do It | DIY or Pro? |
|---|---|---|
| Final lawn mow (cut to 2.5-3 inches) | Late September — before first frost | DIY |
| Fall fertilizer (high potassium, winterizer formula) | Late September / early October | DIY |
| Sprinkler system blowout (CRITICAL) | September 1 — October 1 (hard deadline) | Professional only — J.G. Irrigation: 587-433-4795 |
| Controller power off + program backup | Same day as blowout | DIY after blowout is confirmed |
| Backflow preventer insulation (if above ground) | Same week as blowout | DIY — foam insulation wrap from hardware store |
| Garden bed cleanup + drip irrigation flush | October — before hard freeze | DIY or J.G. Irrigation maintenance visit |
The sprinkler blowout is the only item on this checklist that absolutely requires a professional with the right compressor. Every other item can be completed by a motivated Calgary homeowner. The blowout sets the clock for everything else — book it in early September, and plan the rest of your winterization around it. Call J.G. Irrigation: 587-433-4795.
Can I winterize my irrigation system myself in Calgary?
The lawn prep (mowing, fertilizing) is absolutely DIY. The sprinkler blowout should not be: a residential compressor (typically 5-10 CFM) does not generate the volume required to clear all water from every zone. Remaining water freezes in winter and cracks fittings. J.G. Irrigation uses commercial 185 CFM towable compressors — guaranteed complete water removal. Call 587-433-4795.
Calgary Winter Lawn Prep — Book Blowout + Get Complete Checklist
J.G. Irrigation — Calgary Irrigation Services
- Sprinkler Installation Calgary
- Sprinkler Blowout Calgary
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