Getting a skid steer ready for summer pasture maintenance means making the right attachment decision upfront. Flail mower or rotary cutter? Standard or high-flow? This guide covers the setup decisions, mowing timing, terrain hazards, and why the answer changes depending on where you're farming in Canada.
A skid steer isn't the traditional choice for pasture mowing — most Canadian farmers default to a tractor-mounted mower for that job. But skid steers earn their keep in pasture maintenance in specific situations: small or irregular pastures that are awkward for a larger tractor, steep slopes where a tractor poses stability risk, and farms where the skid steer is already on-site and a tractor isn't. If you're setting one up for summer pasture work, the attachment decision matters more than most people realize.
This guide covers attachment selection, hydraulic requirements, mowing timing for western Canada, terrain hazards by region, and the BC-specific case where a skid steer and flail mower regularly outperforms a tractor setup.
For pasture work specifically, the choice between a flail mower and a rotary cutter isn't just about cutting capacity — it's about what you want the pasture to look like after, and the terrain you're working on.
Limitations: Side discharge creates windrows that can smother pasture regrowth. Higher-velocity projectile risk if blade contacts rock. Discharge hazard makes it unsuitable on slopes above occupied areas. Not ideal for irregular or rocky terrain.
Limitations: Large models (72"+ wide) need high-flow hydraulics (28–40 GPM). Slower ground speed for equivalent coverage area. More expensive to rent than a rotary cutter. Not as effective on very heavy, tangled material that a rotary cutter would roll over.
In BC — particularly in the Interior, Peace Country, and coastal areas — pastures are frequently on slopes. This is where the flail mower establishes a clear advantage over the rotary cutter for skid steer applications.
A rotary cutter on a slope discharges cut material downhill. In dry summer conditions, that creates a fire hazard along the lower edge of the pasture. In areas with residences, livestock, or fencing below the work area, the projectile hazard from a rotary cutter's blade — which can throw rocks and debris a significant distance — is a real safety issue. A flail mower mulches material in place. There is no discharge. The cut material stays where it was cut, decomposes on the surface, and returns organic matter to the soil. On BC ranch terrain where you're mowing across slopes, the flail mower is the professional choice for both safety and agronomic reasons.
Browse Canadian-stocked flail mower attachments for skid steers — standard-flow and high-flow models, 60" to 84" working widths, Y-blade and hammer blade configurations.
Rotary cutters in 60"–84" widths for standard and high-flow skid steers. The cost-effective choice for open, flat pasture work.
Hydraulic flow mismatch is the most common and most avoidable problem with skid steer mower attachments. Using an undersized flow machine with a high-flow mower means the rotor can't reach design speed, cutting quality drops significantly, and the hydraulic system may overheat. Using an oversized flow machine with a standard-flow mower can damage the attachment's hydraulic motor.
| Attachment Type | Width | Typical Flow Requirement | Machine Requirement |
|---|---|---|---|
| Rotary Cutter — Standard | 60"–72" | 18–22 GPM | Standard-flow skid steer. Most machines qualify. |
| Rotary Cutter — Heavy Duty | 72"–84" | 22–28 GPM | Higher-end standard flow or low-end high-flow. Check your machine's rated output. |
| Flail Mower — Small | 60"–66" | 18–24 GPM | Standard-flow machine. Most common skid steers qualify. |
| Flail Mower — Mid | 68"–72" | 22–30 GPM | High-flow or upper-range standard flow. Verify before renting. |
| Flail Mower — Large | 74"–84" | 28–40 GPM | High-flow machine required. Not compatible with standard-flow skid steers. |
Your skid steer's rated auxiliary hydraulic flow is in the operator's manual and on the machine's specification plate. Look for "auxiliary hydraulic flow" or "high-flow auxiliary" — these are two different circuits on most machines. Standard flow is the base circuit; high-flow is an optional second circuit that delivers higher GPM, usually activated by a switch or lever. If your machine has a high-flow option, it must be engaged — if the switch isn't on, you're running standard flow even if the machine is a high-flow model.
Flail mowers for pasture use come with two blade types: Y-blades (also called free-swinging or grass blades) and hammer blades (T-blades). Y-blades are the standard choice for grass and lighter vegetation — they're lighter, faster spinning, and cut cleanly. Hammer blades are heavier and more durable for mixed terrain with brush, woody material, or when you're likely to hit rocks. For a typical Canadian pasture with grass, weeds, and occasional shrub regrowth, Y-blades are appropriate. For a rougher pasture in the BC Interior or Alberta foothills with embedded rock and mixed brush, hammer blades reduce the risk of blade damage.
Pasture mowing timing has more to do with the grass than the calendar. The goal is to reduce competition from weeds and rank growth, keep palatability up, and not mow so late that the pasture can't recover before the growing season ends. The calendar is a guide — what the pasture is doing tells you the right moment.
In Alberta, Saskatchewan, and BC, the primary pasture mowing window is late June to mid-July. The reasons:
Eastern Canadian pastures often get two mowing passes — one in May or June to manage early growth and prevent rank patches from developing, and a second in August to manage regrowth and weeds after the summer grazing rotation. The first pass is often lighter and more targeted; the second pass covers the whole pasture after cattle have been moved through the rotation.
The most reliable timing signal on a cow-calf operation isn't the calendar — it's livestock movement. When cattle are rotated off a pasture or calves are weaned and cattle moved to a drylot or different pasture, that's your window to bring the mower in. The pasture is clear, the growth is visible, and the next grazing rotation gives the mowed pasture time to recover. If you're using a rotational grazing system, build the mowing pass into your rotation calendar so it happens every 2–3 years on each paddock, not reactively.
Pastures in Alberta, Saskatchewan, and Manitoba present terrain hazards that can damage a mower or cause a machine incident. Scout before you mow if you're working ground you haven't mowed before.
Badger holes in open grassland are a genuine hazard. A fresh badger hole can be 20–30 cm across and 60–90 cm deep — large enough to swallow a mower deck or cause a sudden pitch that breaks the attachment or, on a slope, destabilizes the machine. Badgers are active in Prairie pastures from spring through summer, and new excavations appear without warning. Walk or ATV a pasture before the first mow of the season, particularly in areas where you know badgers are present. Mark any holes you find. If the pasture has a history of badger activity, slow your mowing speed significantly — you need time to react and raise the deck.
Alberta foothills pastures and Saskatchewan/Manitoba glacial till areas frequently have embedded rock that doesn't show above the grass surface but sits shallow enough to contact a mower deck or blade. A rotary cutter blade hitting a large embedded rock at full speed can cause catastrophic blade failure and a serious safety incident. A flail mower is more forgiving — individual flails deflect on rock contact rather than shattering — but rock outcrops damage flail blades and blade carriers over time.
For pastures with known or suspected shallow rock: walk the pasture and flag any visible rock outcrops. Run your first pass at a slower speed. Consider running with the deck slightly higher than your target cutting height on the first pass and dropping to the final height on a second pass — this gives you more clearance for unexpected contacts. If a pasture has consistent shallow rock throughout, a flail mower with hammer blades is the better choice over a rotary cutter.
Prairie pastures almost always have wet low spots — sloughs, seasonal wetlands, and depressional areas that look dry from the cab but are soft underfoot in June and July. A mower deck is a heavy attachment and concentrates the machine's front weight — driving a loaded front-end into a soft low spot at mowing speed can result in the machine bogging down, rutting, or in the worst case, the machine pitching forward. Identify wet areas before mowing by walking the pasture. Mark them and either avoid them entirely or mow around them later in the season when they've dried down.
Pasture mowing patterns matter less than field mowing, but a few principles improve efficiency:
A: The ideal window for pasture mowing in western Canada is late June to mid-July — after calves are old enough that risk from the mower is manageable, before cool-season grasses set seed, and while warm-season growth is still active enough to recover before fall. Mowing too early (before early June) disrupts spring growth at a critical point. Mowing too late (after early August) doesn't give the pasture enough time to regrow before the growing season ends, reducing fall grazing quality. In Alberta and Saskatchewan, aim for the window between when cattle have been moved off the pasture and before the first week of August.
A: For large flail mowers (72" and wider), yes — high-flow hydraulics are required. Most large flail mowers need 28–40 GPM to operate at full rotor speed, and standard-flow skid steers typically deliver 18–22 GPM. Running a high-flow mower on a standard-flow machine results in significantly reduced rotor speed, poor cutting quality, and possible overheating of the hydraulic system. Smaller flail mowers (60" and under, some 66" models) are designed for standard flow and run well on most skid steers. Always confirm the mower's GPM requirement against your machine's rated auxiliary hydraulic flow before renting or buying.
A: A rotary cutter uses one or two large rotating blades that cut grass in a wide sweep and discharge cut material to the side or rear. It's faster, handles heavy growth well, and works on standard hydraulic flow. Limitations: the side discharge can create windrows that shade the pasture and slow regrowth; the blade geometry creates higher-velocity projectiles if it contacts rocks; and on slopes, discharged material can create fire hazards in dry conditions. A flail mower uses many small individual flail blades (Y-blades or hammer blades) on a rotating drum that pulverize material and leave it spread evenly on the surface. The mulch decomposes faster, provides more even regrowth, and there's no discharge hazard. Flail mowers handle rough terrain better — the individual flails can follow ground contour variations. The tradeoff: generally slower and requires more hydraulic flow for larger models.
A: Three main hazards in Prairie pastures: badger holes (common in open grassland — the hole itself is a machine hazard and can appear without warning), embedded rock outcrops (particularly in Alberta foothills pastures and SK/MB glacial till areas — rocks that don't show above the grass surface but are shallow enough to contact a mower deck), and wet low spots that look dry from the cab. Badger holes can swallow a mower deck or cause a sudden pitch that damages the attachment or tips the machine on a slope. Scout the pasture on foot or by slow ATV pass before mowing if you haven't worked the field before. Rock outcrops are the most common reason for blade and blade carrier damage on Prairie pastures — any field with visible surface rock should be treated with caution and a slower mowing speed.