But with so many options—weed sprayer trailers, battery-powered units, 12V systems, boom sprayers, and more—how do you pick the right one?
In this guide, we’ll break down the most popular types of weed spray units, explain what they’re best for, and help you decide which weed sprayer suits your property size, vehicle setup, and spraying goals. Let’s dive in.
What Is a Weed Sprayer?
A weed sprayer is a piece of equipment designed to apply herbicide (or other liquids like pesticides or fertilisers) across specific areas. It helps you manage weeds efficiently—whether you’re targeting individual plants in a garden or blanketing several acres of land.
You can get weed sprayers in various forms: handheld for small areas, tank and pump sprayers for medium jobs, and trailer-mounted weed sprayers or boom sprayers for large-scale spraying.
Types of Weed Sprayers: Which One’s Right for You?
1. Battery Powered Weed Sprayer
If you’ve only got a small garden or backyard to manage, a battery-powered weed sprayer is a great place to start. These units are portable, lightweight, and easy to operate. Most have a rechargeable battery that powers a small pump, pushing herbicide through a hose or wand.
They’re quiet, low-maintenance, and ideal for spot-spraying flower beds, veggie patches, or weeds along fences. Look for models with at least a 10-15L tank to avoid too many refills.
Why choose a battery weed sprayer?
- No manual pumping
- Lightweight and easy to carry
- Great for small to medium gardens
2. 12V Weed Sprayer
For a bit more power and capacity, step up to a 12 volt weed sprayer. These units are designed to connect to a 12V battery—often from a car, ute, or quad bike. They typically come with a tank (anywhere from 30L to 200L), a pump, and a hose or boom.
A weed sprayer 12V system is perfect for medium to large gardens, hobby farms, or rural blocks. Some even mount neatly in a ute tray or on a trailer.
Key benefits:
- Easy to mount to vehicles
- Larger capacity (ideal for fewer refills)
- Great balance of power and portability
3. Weed Sprayer for ATV and Quad Bike
Got a four-wheeler or quad bike? Then a weed sprayer for quad bike is a no-brainer. These sprayers strap or bolt onto the back of your ATV and are powered by a 12V battery connection.
Some units come with a weed sprayer boom that extends the spray width dramatically, making it easy to cover a wide swath of land in one go.
Perfect for:
- Spraying fence lines
- Pasture maintenance
- Large blocks and rough terrain
Many of these ATV weed sprayers also work with boom kits or hand wands, giving you flexibility depending on the job.
4. Trailer-Mounted and Tow-Behind Weed Sprayers
For serious acreage or large commercial jobs, a weed sprayer trailer is a powerful solution. These trailer mounted weed sprayers are built to be towed behind a ride-on mower, quad bike, or small tractor. They usually come with heavy-duty tyres, large tanks (100L+), and powerful pumps.
Some models even come as a complete weed sprayer with trailer and boom system, giving you massive spray width and high efficiency.
Trailer weed sprayers are perfect for:
- Paddocks and pasture land
- Roadside or boundary spraying
- Vineyards, orchards, or broadacre farms
Top features to look for:
- 100L or larger tank
- Wide boom arms
- High-pressure pump
Weed Sprayer Tanks and Units: What You Should Know
Whether you’re buying a compact kit or a full weed sprayer unit, the weed sprayer tank is the heart of the system. These tanks come in a range of sizes:
- 10L–30L: Good for handheld and battery sprayers
- 50L–100L: Ideal for ATV or trolley setups
- 100L–300L+: Best for trailer-mounted units or large-scale use
Make sure the tank is made from UV-stable, chemical-resistant plastic. You'll also want to check for easy filling, draining, and cleaning features.
Many units come as weed sprayer kits, complete with hose reels, boom sprayers, and even remote controls for activating the pump from your vehicle.
Boom Sprayers: For Covering Large Areas Fast
A weed sprayer boom is essentially a set of arms with multiple spray nozzles. When mounted to a trailer, ATV, or quad bike, it allows you to cover a wide strip of land quickly and evenly.
A weed sprayer boom kit might be sold as an add-on or bundled with your sprayer. It’s a fantastic upgrade if you’re tackling:
- Broad paddocks
- Sporting fields
- Driveways or firebreaks
Boom kits typically range from 1.5 metres to over 3 metres wide. Some models are adjustable and foldable for easier transport.
Weed Sprayer Kits: All-in-One Solutions
If you're new to spraying or just want a hassle-free setup, look for a weed sprayer kit. These are ready-to-go systems that include the tank, pump, hose, wand (or boom), and sometimes mounting brackets or trolleys.
A complete weed spray unit saves time and ensures all parts are compatible. Great for DIYers, farmers, and landscapers alike.
Common Use Cases for Weed Sprayers
Weed sprayers are versatile tools that come in handy in a heap of situations:
- Spot spraying small weeds in garden beds or driveways
- Blanket spraying pasture or lawn areas
- Boundary maintenance along fences or rural driveways
- Selective spraying with targeted herbicides in crops
- Firebreak and track control on rural blocks
Whether you’re managing a suburban backyard or hundreds of hectares, there’s a sprayer setup to match.
Weed Sprayer for Sale: Where to Buy in Australia
Shopping for a weed sprayer for sale? You’ve got plenty of options both online and in-store:
Online retailers:
- MyDeal, Catch, eBay – wide range of affordable sprayers
- Agricultural suppliers – more industrial-grade options
- Manufacturer sites – full kits with warranty and support
Local stores:
- Bunnings – good for garden-sized sprayers
- Ag stores (like Elders or CRT) – great for farmers and large properties
- Tool shops – often carry trailer and ATV sprayers
Before buying, make sure you check:
- Tank size
- Pump strength (litres per minute and pressure rating)
- Boom width (if applicable)
- Vehicle compatibility (12V plug, tray mount, trailer hitch)
Maintenance Tips to Keep Your Sprayer in Top Shape
A good weed sprayer unit can last years—if you look after it. Here are some basic tips:
- Rinse after every use. Flush the tank, hose, and pump with clean water to prevent chemical buildup.
- Check filters and nozzles. Clean or replace them regularly to avoid clogs.
- Inspect hoses for cracks. Especially important for 12V and battery sprayers.
- Keep batteries charged. For battery powered weed sprayers, store the battery in a dry place and follow manufacturer instructions.
- Winterise your unit. If you’re not spraying for a while, drain and dry the tank and lines.
Final Thoughts: Pick the Right Sprayer for the Job
When it comes to weed control, the right sprayer makes all the difference. Whether you’re looking for a compact weed sprayer battery model, a powerful weed sprayer trailer, or a versatile weed sprayer boom kit, there’s a setup that’ll make your life easier—and your property weed-free.
Think about the size of the area you need to cover, how often you spray, and whether you’ll be towing, carrying, or mounting the unit. From a simple weed sprayer tank and pump to a full-blown trailer mounted weed sprayer, there’s a solution out there for every Aussie block.
Ready to upgrade your spraying game? Shop for weed spray units for sale online or at your local ag supplier—and take back control of your land.