6 Best Trailer Sprayers for Farm Use

There comes a point when a backpack sprayer just won’t cut it anymore, and your back is the first to let you know. You’re staring down a few acres of pasture that need treating, a long fenceline choked with weeds, or an orchard that needs a dormant oil spray. This is when you realize a good trailer sprayer isn’t a luxury; it’s a fundamental tool for managing your land effectively.

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Why a Reliable Trailer Sprayer is a Must-Have

A trailer sprayer is a massive force multiplier for any hobby farmer. It transforms a task that would take an entire weekend with a backpack sprayer into a manageable afternoon job. This isn’t just about saving time; it’s about saving your energy for the hundred other things that need doing.

The real value lies in consistency and coverage. A tow-behind unit delivers a steady, even application that’s nearly impossible to replicate by hand. Whether you’re applying liquid fertilizer, herbicide, or pesticide, that even coat means better results and less wasted product. It allows you to cover large areas like pastures, food plots, or long driveways quickly and efficiently, something that’s simply out of reach with smaller equipment.

Forget the idea that these are only for big operations. For a serious hobby farm, a trailer sprayer is the logical step up. It bridges the gap between handheld tools and commercial-grade equipment, giving you professional capability on a scale that makes sense for your land. It’s an investment in doing the job right, the first time.

Fimco 60-Gallon: The All-Around Workhorse

When you see a yellow tank on a trailer, there’s a good chance it’s a Fimco. This 60-gallon model is the quintessential all-arounder, big enough to handle several acres without constant refilling but still nimble enough to be pulled by a standard ATV or utility tractor. It’s the perfect size for someone managing a mix of pasture, larger gardens, and property perimeters.

What makes it a workhorse is its versatility. Most models come equipped with both a broadcast boom for covering open ground and a handgun sprayer on a long hose for spot treatments. This means you can spray your entire pasture for broadleaf weeds and then hit the stubborn thistle patches along the fenceline in the same session. It’s this combination of capacity and flexibility that makes it a staple on so many properties.

NorthStar 21-Gallon Boomless Broadcast Sprayer

Sometimes, a traditional boom is more of a hindrance than a help. If your property is dotted with trees, rocks, or other obstacles, a boomless sprayer like this 21-gallon NorthStar is a game-changer. Instead of a wide, rigid boom that can snag on everything, it uses one or two specialized nozzles to spray a wide, fan-shaped pattern.

The tradeoff is precision for convenience. You won’t get the perfectly uniform coverage of a boom sprayer, which can be critical for certain applications. But for blanketing a rough-cut field, a winding driveway, or an overgrown fenceline, the ability to maneuver without worry is invaluable. It’s a specialized tool that solves a very common problem on less-than-perfect terrain.

Kings Sprayers 50-Gallon: Built for a Lifetime

If you believe in the "buy once, cry once" philosophy, Kings Sprayers should be on your radar. These units are engineered for longevity, not a low price point. You’ll notice the difference immediately in the components: rugged aluminum frames that won’t rust, high-end pumps, and quality plumbing that resists chemical corrosion.

This isn’t the sprayer you buy for occasional use; it’s the one you buy when spraying is a regular, critical part of your land management. The upfront cost is significantly higher, but it pays you back over years of reliable service and fewer frustrating breakdowns. For the farmer who depends on their sprayer season after season, the peace of mind that comes with this level of quality is worth every penny.

Workhorse LG25DTS: Compact and Dependable

Not everyone needs a massive tank. The Workhorse 25-gallon sprayer hits a sweet spot for smaller properties or for those who prefer a more compact setup. It’s light enough to be pulled by smaller lawn tractors and ATVs without straining the transmission, making it accessible for a wider range of equipment.

This is a no-frills, dependable unit designed to do one job well. It’s perfect for treating a one-acre food plot, a large residential lawn, or a series of garden beds. Its simplicity is its strength; with fewer moving parts and a straightforward design, there’s less that can go wrong. It’s a solid, reliable choice for targeted applications where a bigger tank would be overkill.

Chapin 97600 15-Gallon: For Precise Spot Spraying

Think of the Chapin 15-gallon as the ultimate upgrade from a backpack sprayer. It offers the convenience of a tow-behind unit without the bulk of a large broadcast system. Its primary strength is in targeted applications where you need more volume than a backpack can offer but still require precision.

This is the ideal tool for spot-treating invasive weeds across a few acres of pasture, applying specific treatments around individual trees in an orchard, or managing weeds in complex, landscaped areas. The included spray wand is the main attraction here. It gives you the control of a handheld sprayer with the capacity to work for hours, not minutes, before needing a refill.

Agri-Fab 45-0292: Simple, Tough, and Effective

The Agri-Fab sprayer is built on a simple premise: toughness over features. This is a basic, blow-molded tank on a steel frame that’s designed to be dragged across fields without complaint. It might not have the fanciest pump or the most elaborate boom, but it is incredibly durable and easy to operate.

Its simplicity makes it nearly foolproof. The hand wand is great for spot spraying, and the rear broadcast nozzle covers a decent width for general applications. For someone who needs a sprayer for occasional use and values durability and a low price above all else, the Agri-Fab is a proven and effective option that won’t let you down.

Key Features: Pump Type, Tank Size, and Nozzles

Understanding the core components of a sprayer is more important than the brand name on the tank. The pump is the heart of the system. Most sprayers you’ll see use a diaphragm pump, which is excellent for handling common herbicides and pesticides. They are reliable and can run dry for short periods without damage.

Tank size dictates your efficiency. A bigger tank means fewer trips back to the barn for a refill, but it also means more weight and a larger vehicle to pull it. A good rule of thumb:

• 15-25 Gallons: Ideal for 1-3 acres, spot spraying, or use with a lawn tractor.
• 40-60 Gallons: The sweet spot for 3-10 acres, handling small pastures and larger food plots with an ATV or UTV.

Finally, the nozzles determine how the liquid is applied. A boom with multiple nozzles provides the most even and precise coverage, perfect for row crops or lawns. A boomless or broadcast nozzle throws a wide pattern, which is great for rough terrain but less precise. And a spot-spraying wand is essential for targeting individual weeds or spraying around sensitive plants. The best sprayers offer a combination, giving you the flexibility to tackle any job on your property.

Choosing the right trailer sprayer comes down to an honest assessment of your land and your tasks. The best machine isn’t the biggest or the most expensive; it’s the one that fits the scale of your work and saves you time and effort. Make the right choice, and you’ll spend less time fighting weeds and more time enjoying the results of your labor.

Frequently Asked Questions (FAQs)

What is a trailer sprayer used for on a farm?

A farm trailer sprayer is a tow-behind tank and pump system designed to broadcast liquid fertilizers, herbicides, and pesticides across crops or pastures. Most agricultural models feature folding spray booms ranging from 10 to 60 feet wide, paired with a handheld spray wand for spot treatments. Farmers tow them behind tractors, utility vehicles, or pickup trucks to cover large fields without mounting heavy liquid weight onto the vehicle frame. Tank capacities typically range from 50 to 1,000 gallons.

What size trailer sprayer do I need for small acreage pasture management?

Small acreage pasture management between 5 and 20 acres generally requires a trailer sprayer with a 50-gallon to 150-gallon tank. This tank volume lets you cover roughly two to five acres per fill at a standard broadcast rate of 20 to 30 gallons per acre. A rig with a 10-foot to 15-foot folding boom balances broad coverage with clearance around gates and tree lines. For properties under 5 acres, a 25-gallon trailer unit pulled by an ATV is usually sufficient.

How do I calibrate a trailer sprayer for farm use?

Calibrating a farm trailer sprayer requires measuring your ground speed, nozzle output in ounces per minute, and nozzle spacing along the boom. First, measure a test distance like 200 feet and record the travel time at your standard throttle setting. Next, collect liquid output from every nozzle for that same duration using a graduated catch cup, checking for uniform discharge within 10 percent. Multiply your collected ounces by 4,070, then divide by nozzle spacing in inches times test feet to determine gallons per acre.

How do you winterize a pull behind farm trailer sprayer?

Winterizing a pull-behind trailer sprayer involves draining all residual water and pumping non-toxic RV antifreeze through the entire plumbing circuit. Start by draining the main tank completely, clearing line strainers, and flushing out chemical residue. Add two to five gallons of propylene glycol antifreeze to the tank, turn on the pump, and open the boom valves until colored fluid discharges from each nozzle tip. Remove nozzle screens and tips to store them indoors in a clean, dry container over winter.

Is a trailer sprayer better than a 3-point hitch sprayer?

Trailer sprayers offer larger tank capacities and easier hookup than 3-point hitch sprayers, but they require a wider turning radius at field edges. A trailer model transfers hundreds of pounds of liquid weight onto its own axle rather than stressing the tractor rear axle and hydraulic lift arms. In contrast, 3-point hitch sprayers deliver superior maneuverability in tight corners, hilly terrain, and muddy soils where towed wheels might rut or track crops. Choose a trailer sprayer if your tractor has low hydraulic lift capacity or you spray expansive acreage.

How much does a commercial farm trailer sprayer cost?

Commercial farm trailer sprayers typically cost between $1,500 and $18,000 depending on liquid capacity, boom width, and pump construction. Entry-level utility models with 50-gallon to 100-gallon tanks and 12-volt diaphragm pumps range from $1,500 to $3,500. Heavy-duty agricultural units offering 300 to 1,000 gallons, hydraulic folding booms, and cast iron centrifugal PTO pumps cost from $6,000 to over $18,000. Replacement parts like boom shutoff solenoid banks or proportional rate controllers add another $400 to $2,500 to the total investment.

Why is my trailer sprayer losing pressure during application?

Pressure loss in a farm trailer sprayer is most frequently caused by a clogged inlet suction strainer, air leaks in supply hoses, or a worn pump diaphragm. Inspect and rinse the inline mesh filter first, then tighten hose clamps along the suction line to stop air leaks. If pressure still drops when opening boom valves, check the pressure regulator spring and bypass seat for stuck debris. Worn pump valves or cracked diaphragms should be rebuilt if fluid output pulses irregularly or drops below 30 PSI.

Are trailer sprayers safe to pull behind a tractor on steep slopes?

Operating a liquid-filled trailer sprayer on steep slopes presents significant rollover risks because liquid slosh drastically shifts the center of gravity. Agricultural trailers become unstable on grades exceeding 15 percent, especially when partially filled without internal tank baffles. Always travel straight up and down hillside slopes in low gear rather than traversing across the face of an incline. Equip your tractor with front wheel weights to maintain steering traction, and verify that the towing vehicle weighs substantially more than the loaded trailer sprayer.