A well-mowed lawn is the foundation of a good-looking yard, but mowing too often wastes money and mowing too infrequently lets the grass get ahead of you. The right schedule depends on Ottawa's climate, your grass type, and how quickly your particular lawn puts on growth.
The short answer for Ottawa lawns
Most Ottawa lawns thrive on regular scheduled mowing from late May through mid-August, when daytime temperatures regularly hit 20-30 degrees Celsius and rainfall keeps the soil moist. Kentucky bluegrass, which dominates Ottawa lawns, grows fastest during this window and benefits from consistent cutting.
From mid-April through May, and again from mid-August through October, flexible scheduled intervals are usually enough. Growth slows as temperatures drop and rainfall decreases, so the lawn stays neat with less frequent passes.
Mowing height matters more than frequency
Cutting too short is more damaging than cutting too infrequently. Scalping the lawn removes the leaf tissue that feeds root growth, exposes soil to weed seeds, and stresses the turf through Ottawa's hot, dry July and August stretches.
The general rule: never remove more than one-third of the grass blade in a single cut. For most Ottawa lawns, that means a mowing height of 7.5 to 8.5 centimetres (three to three and a half inches) during peak summer, dropping to about 6.5 centimetres (two and a half inches) in spring and fall when growth is slower and the grass can handle a shorter cut.
Signs your lawn needs more or less frequent mowing
Watch the lawn, not the calendar. If you're seeing any of these, adjust the schedule:
- Grass is tall or bent over: Your lawn needs a tighter scheduled cadence during peak growth surges.
- Clumps of clippings left behind after mowing: The grass is too long for a single cut. Either increase scheduled frequency or have the first visit be a restoration cut.
- Brown tips after mowing: The blade is dull or the cut is too short. Sharpening blades and raising the deck height fixes this.
- Thick, healthy lawn that looks fine over time: You can spread out your scheduled visits and save on service costs.
Shaded lawns grow slower
If your yard sits under mature trees or between tall fences, those shaded sections grow noticeably slower than the sunny parts. Many Ottawa properties have a mix of sun and shade across the same lawn. A good mowing service adjusts cutting height by zone, going slightly higher under canopy where growth is slower and the grass needs every leaf it can get.
What about the first and last cuts of the season?
The first cut in spring (usually mid to late April in Ottawa) sets the tone for the season. Cut at a normal height, not too short. The last cut in late October or early November should be at the standard height as well. Don't scalp the lawn going into winter -- the stubble insulates the crown of the plant through freeze-thaw cycles.
How our mowing service works
Adel's Yard Services offers scheduled and one-time lawn mowing across Ottawa and surrounding areas. Every visit includes mowing, edging along walkways and driveways, line trimming around obstacles, and a full cleanup of clippings. We arrange scheduled visits that work best for your timing and property.
Learn more about our Ottawa lawn mowing service, or request a free quote with your address and we'll come back with a price.