Best Backpack Sprayer for Your Garden and Lawn – Battery Powered and Pump Sprayers for Fertilizer or Killing Weeds

When shopping for the best backpack weed sprayer or fertilizer applicator, you’ll want a mix of features, longevity, and ease of use — all at an affordable price. While we have focused on products that would be great for gardening and landscaping tasks, they would all work well for other applications too. There’s a variety of models of on the market, which is why we’ve chosen five dependable brands that each have an extensive collection of backpack sprayers available.
Dry Weight
Max Pressure
Our Top Choice
Solo Professional Piston Backpack Sprayer
Solo has been a pioneer of chemical applicator technology since 1951 as one of the first creators of the motorized backpack sprayer.
High-density polyethylene tank holds most chemicals, operates at pressures of up to 90 PSI, and has fatigue-minimizing features.
Although the piston pump is powerful, some may prefer battery-powered options for large fields.
Piston Pump
14 Pounds
4 Gallon
90 PSI
Manufacturer Limited
Best Value
Chapin 4 Gal Motorized Backpack Sprayer
Since 1884, Chapin has built a legacy on liquid containers and backpack sprayers.
Nearly two hours of continuous spraying. Wide-mouth tank is easy to fill and use.
Although the range is 25-35 feet, the maximum PSI is only 35-40.
Electric Motor
10.5 Pounds
4 Gallon
35-40 PSI
Lifetime Limited
Hudson Professional Bak-Pak Sprayer
Hudson is one of the largest manufacturers of backpack sprayers worldwide with dozens of models available for personal or professional use.
The solid steel wand has adjustable spray patterns and 70 PSI.
While versatile, unfortunately the Bak-Pak lacks extra features for comfort.
Diaphragm Pump
12 Pounds
4 Gallon
70 PSI
1-Year Warranty
Rainmaker Pump Sprayer, 1-Gallon
Rainmaker multi-purpose sprayers and watering products are perfect for any garden or field, and the brand makes products to suit its customers’ needs.
Funnel top opening for easy filling and a trigger with a lock-on option for continuous spraying.
Only a 1-gallon capacity, though other sizes are available.
Piston Pump
2.6 Pounds
1 Gallon
1-Year Warranty
D.B Smith Field King Backpack Sprayer
D.B. Smith has been a leading innovator in liquid applicator technologies for 125 years.
No-leak internal pump and high-quality seals for maximum chemical resistance.
Unfortunately, it can be quite heavy to carry around when full.
Piston Pump
12.8 Pounds
4 Gallons
150 PSI
1-Year Warranty

Related Reviews
Best Lawn Fertilizer
Best Bloom Booster
Best Grass Seeds
Best Chemical Sprayer

How Do I Choose a Backpack Garden Sprayer?

While handheld chemical sprayers will get the job done for smaller gardens and lawns, if you have a large area to cover, they can be tiresome and heavy to carry. This is where heavy-duty professional chemical sprayers that you wear on your back can be a lifesaver. Both styles can be used for applying fertilizer, organic pest control products and liquid weed killers.

A backpack sprayer can help keep your garden and lawn looking like spring all year round. From flower beds to farm fields, chemical applicators can keep animals and pests away. They usually have a tank, a hose, and a wand with separate spray nozzles, and inside the tank there will be one of three types of pumps.
  • Piston pumps are the simplest, and produce a high PSI for thicker chemicals.
  • Diaphragm pumps have closed-off cylinders that are more resistant to corrosive chemicals over years.
  • Motorized pumps are the easiest to use, but the hardest to clean and replace internally.
So lace up your work boots, grab your gloves, and put on your best face shield while we take you through the different types of backpack sprayers!
A variety of factors affect the price of a backpack sprayer, including features, design, materials, size, and manufacturing quality. Tanks can range from small ½-gallon models to large, 5-gallon tanks.

The price for battery operated backpack sprayers will be higher than manual pump ones, however the convenience factor may be worth the investment — especially if this is a garden tool that you will be using on a regular basis.

Although it may be tempting to buy a cheap backpack sprayer, any container of hazardous chemicals needs to be dependably reinforced.
As any gardener and landscaper will know, it’s important to have different nozzles depending on the task. A single stream can be perfect for large ranges and huge fields, but a gentle mist or spray may be more appropriate for your flowerbeds and leaves.

Hose and wand length can help for hard-to-reach hanging plants, and special features such as a locking valve for easy shut-off can prevent leaks during storage.

Look for extra features such as padded straps, additional belt straps, a handle for carrying, and name-brand seals for longevity.

How To Calibrate A Backpack Sprayer For Even Coverage

Calibrating your sprayer is easy if you know the right way to do it. | Courtesy of UNL Extension
Construction and Design
As with most tools, the beauty is in the details. High-density polyethylene tanks are naturally resistant to corrosion and chemical destruction, and are standard for most backpack sprayers. Tanks are usually designed to fit comfortably and distribute weight evenly over long periods of time, and the cleverest designs have wide or funneled mouth openings for spill-free filling. Hose construction is usually clear polyethylene as well, and wands are normally created with stainless steel, brass, or more polyethylene.
Performance and Ease of Use
When choosing a backpack sprayer, most will require some quick and easy assembly. Double check to make sure you have any necessary tools before arrival. After that, the most important choice is going to be a manual vs. automatic sprayer. Both are convenient and easy to use, although automatic sprayers can help if you have multiple acres of fields to cover without aerial support.

Automatic backpack sprayers operate differently from manual pumps, and have their pros and cons. Larger fields may be easier to spray continuously, but parts, repair, and overall cost may be more expensive. Range is normally predetermined and unalterable, but you simply won’t find a more convenient way to apply pesticides, protective chemicals, and pest repellants over a large surface area.

Manual applicators come in two varieties: diaphragm pumps and piston pumps. In manual sprayers, a separate chamber inside the tank collects liquid and pressurizes it. Manual backpack sprayers usually operate between 25 and 90 PSI — enough for a 35 to 50-foot range. The less complicated design makes repair and replacement of parts easier and less expensive, although it will take more effort to spray larger crops.

Regardless of what type of sprayer you get, for best results you want to choose a time when it is not windy, when lawn or plants are dry and when there is not expected to be any rain for at least 6 hours. And always wear protective gear when using chemicals.

Using Organic Weed Killer with Backpack Weed Sprayer

Today on the farm we'll test some all-natural organic weed killer. | Courtesy of Stoney Ridge Farmer

Who Makes the Best Backpack Sprayer?

Now that you’ve learned about the different types of backpack sprayers and some of their most unique features, let’s take a look at the top five brands we’ve chosen to review!
Our Top Choice
The Solo Professional Piston Backpack Sprayer can handle virtually any spraying task with ease. Don’t want a manual hand pump? Check out the Solo 417 Battery Powered Backpack Sprayer

Solo 4 Gallon Professional Piston Backpack Sprayer with Four Nozzles

Solo was founded by two engineers that created one of the first motorized backpack sprayers the world had ever seen. By using new engine technology, they designed a sprayer for one “solo” person to use on large fields and farms. Today, their legacy has expanded to include many lines of chemical applicators, from simple piston pumps to motors with longer battery life.

The Solo Professional Piston Backpack Sprayer has a 4-gallon tank designed for disinfectants, fertilizers, herbicides, pesticides, and other formulations for plant protection. The piston pump has a pressure potential of 90 PSI, with a locking shut-off valve to minimize wear and tear. Viton seals in strategic locations keep the wide-mouth, easily-to-fill tank working for years, and the ambidextrous pump handle has a 48” nylon-reinforced hose with four nozzles for application: jet stream, fan spray, adjustable stream, and hollow cone. Ergonomic padded straps keep the large, UV-resistant, high-density polyethylene tank comfortably secured — even for the toughest jobs.
Best Value
Complete with a Black and Decker motor, the Chapin Wide Mouth Backpack Sprayer is perfect for large fields and landscaping jobs. Looking for a simpler model? The Chapin Tree and Turf Pro may be just the right tool for the job.

Chapin 4 Gallon Wide Mouth 20V Battery Backpack Sprayer Powered by Black & Decker

In 1884 Ralph E. Chapin created a new way to transport kerosene for street lamps. The rest, as they say, is history. The Chapin family of sprayers is extensive, and includes metal Tri-Proxy and stainless steel sprayers, polyethylene sprayers, hand sprayers, dusters, industrial and construction sprayers, cart sprayers, and drum pump sprayers for consumers and commercial use.

The Chapin 4-Gallon Motorized Backpack Sprayer has a 20V lithium ion battery and motor by Black and Decker. It includes a portable charger, and can also be used with other Black and Decker accessories. With 1.75 hours of continuous spraying, you can apply 50 gallons at 35-40 PSI before recharging - that’s a 35-foot range for even the largest fields. The six-inch funnel makes filling the polyethylene tank quick and easy. From the tank, a 48-inch hose connects to the 20-inch wand with a reinforced shut-off switch and three nozzles. The powder-coated steel frame is lightweight, and secured by two deluxe padded shoulder straps.
The Hudson Multi-Purpose Bak-Pak Sprayer is versatile, easy-to-use, and ready for most types of liquids. Looking for a battery-powered model? The Hudson Never Pump Bak-Pak may be perfect for you!

Hudson SP1 Multi-Purpose Professional Bak-Pak Sprayer

Hudson is one of the world’s most specialized providers of chemical applicators and backpack sprayers. With over 125 models available, its extensive line of commercial and consumer equipment can handle jobs of all sizes. The Multi-Purpose Professional Bak-Pak Sprayer is made from quality materials with a time-tested design for longevity and performance, and Hudson stands behind their applicators with a one-year warranty!

The SP1 has a translucent, 4-gallon polyethylene tank with an ultra-wide 6-inch lid for easy filling. Specially patented Viton seals around key components protect the user and the integrity of the 70 PSI diaphragm style pump. A 47-inch industrial spray hose connects to the 20-inch brass wand with a cone pattern nozzle. Three additional nozzles are included at no additional cost, for flat, fanning patterns of spray. The solid steel pump handle resists corrosion and has a locking shut-off valve with an in-line filter, making this simple, easy to use, and dependable.
The Rainmaker 1-gallon pump sprayer is ideal for herbicides, pesticides, and liquid fertilizers. Not looking for a backpack sprayer? Check out the Rainmaker High Flow 4 Way Hose Adaptor Outlet.

Rainmaker Pressurized Pump Sprayer - Available in 6 Sizes

Rainmaker has made a name for itself with quality chemical applicators and accessories at an affordable price. They support their extensive line of backpack sprayers with parts and accessories for every job. The Rainmaker Pump Sprayer is their flagship model, available in sizes from 1/2 to 5 gallons.

The polyethylene tank has a funnel top for easy filling, and it’s connected to a four-foot hose with a built-in pressure relief valve and locking trigger for continuous spraying. The carry grip handle is perfect for small jobs and the included shoulder straps are padded for comfort.
The Field King Professional No Leak Pump Backpack Sprayer is known for its safe, reliable, and comfy design. Looking for something a little lighter? Check out the D.B Smith 1-Gallon Bleach and Chemical Sprayer!

D.B Smith Field King Professional No Leak Pump Backpack Sprayer for Killing Weeds in Lawns & Gardens

D.B. Smith made their first compressed air sprayer in 1888. Over the last century, it’s expanded to offer quality pump sprayers, mosquito foggers, and more for personal and professional use. They have a large selection of backpack sprayers for gardening and landscaping, with dozens of piston, diaphragm, and motorized models available backed up by their 1-year limited warranty.

The D.B. Smith Field King Professional Backpack Sprayer has a patented No-Leak piston pump with adjustable pressures of 25 - 150 PSI. Viton gaskets and seals provide safety for users and longevity for internal components, and the 4-gallon polyethylene tank has a 50-inch reinforced hose attached to the 21-inch wand. Four nozzles provide a variety of spray patterns — including the D.B. Smith patented foaming nozzle. Perfect for right and left-handed use, it has a handle for easy carrying, as well as two padded shoulder straps and a belt.

Need a Commercial Back Sprayer? Check These Out!

We hope you’ve found a dependable and convenient backpack sprayer — and maybe one or two extra for different-sized jobs! Remember that each of these brands has a variety of options available, from handheld misters to large 10-gallon wheeled containers. Every company we’ve covered is a trustworthy partner for your lawn, home, and garden.

Our Top Choice
Solo Professional Piston Backpack Sprayer
Best Value
Chapin 4 Gal Motorized Backpack Sprayer
Hudson Professional Bak-Pak Sprayer
Rainmaker Pump Sprayer, 1-Gallon
D.B Smith Field King Backpack Sprayer