The Best Garden Sprayer Of 2021

As your garden grows, it becomes especially important to use the best garden sprayer possible. This will make things a lot easier for you, the grower, while producing better results with your spraying.

Here at Hydrobuilder, we offer a wide range of sprayers and foggers for all growers, from small, manual hand pump sprayers to electric backpack sprayers.

Regardless of how you’re using it, these products will help you keep your grow room or garden in tip-top shape. Before we get to the sprayers, however, we should cover why you need one!

The Best Garden Sprayer Of 2021


As your garden grows, it becomes especially important to use the best garden sprayer possible - whether it be handheld or a backpack.

This will make things a lot easier for you, while producing better results with your spraying.

With something as simple as this type of product, you may not think it matters. But some sprayers are far superior to others, and if you're going to invest in one, you might as well get the best!

Here at Hydrobuilder, we offer a wide range of sprayers and foggers for all growers, from small, manual hand pump sprayers to electric backpack sprayers for large commercial grows.

Regardless of how you’re using it, these products will help you keep your grow room or garden in tip-top shape.

Before we get to the sprayers, however, we should cover why you need one You may think these are just for pest and disease control, but you can actually use these for a variety of garden care tasks!

Why You Need The Best Garden Sprayer

Some garden sprayers are better than others, but they essentially all do the same thing - apply a fine mist to your plant’s foliage.

There are two main situations where you would need to do this - foliar feeding or pest prevention/control. However, these days, large commercial grow operations need to spray their facility for sanitary reasons too - and we have options for that as well!

Let's start with the more common uses, though.

Foliar Feeding

Foliar feeding is when you feed your plants nutrients directly on the foliage. Normally, you feed your plants at their roots, whether you are in a hydro system or in pots/soil.

Sometimes, however, you need to feed your plants via their foliage. For example, many growers foliar feed secondary nutrients such as Magnesium or Calcium. Foliar feeding works much faster than feeding at the roots.

And a common mistake new growers make is overfeeding or not adjusting pH. This leads to certain nutrients being locked out of the soil, in which case foliar feeding is your only real option. This is also true when your plants become root bound, and cannot uptake any nutrients through the roots.

There are plenty of other benefits to foliar feeding. You won’t have to worry about nutrient build up in your soil, avoiding harmful salt deposits.

This also prevents nutrient lockout. The other time you’ll need a garden sprayer is when you run into pest issues, or simply want to prevent them.

It’s recommended that you lower your nutrient dose when spraying the foliage. You don’t want to risk burning your leaves with test your spray solution before going full bore on your plants.

Try spraying a single leaf first, wait a day, and be sure you don’t irreversibly damage your plants.

Pest prevention/control

Because many pests and diseases typically take hold on your leaves, most of your pest control will target the leaves as well!

Whether you are preventing or treating an outbreak, you’ll have to do some spraying. One common practice is spraying neem oil.

This natural insecticide also has fungicidal properties. Often times, growers will periodically spray their plants with neem oil, whether they have an infestation or are acting proactively.

But if you have a full blown infestation, you'll need to use a pesticide/fungicide to rectify the problem.

How to use a garden sprayer

You may think it’s as simple as filling up a garden sprayer and dousing your plants, but there’s actually more to it. There are a few best practices when it comes to using your garden sprayer.

Two things you need to be careful about are the time of day and weather. The best time to spray is in the morning or late in the evening, as direct sunlight will evaporate and degrade your spray, while also risking burning your plants through the “lens effect”. 

You also don’t want to spray your plants when it’s too hot or too cold. When it’s super hot, your plant’s stomata will close up, making the absorption less effective.

And when it’s cold, you run the risk of promoting fungal growth by spraying.

You also need to be aware of any rain in the forecast, as it will wash off your spray. The same advice applies for heavy winds, which will dry up the spray quicker than ideal.

The other important caveat to using a garden sprayer is to make sure you get all areas of the plant.

A common mistake is only spraying the tops of your leaves. You need to make sure you get the undersides, as this is where more stomata are located.

Plus, this is where many pests, such as aphids or spider mites, like to hide.

One final note is that you don’t want to spray your plants during flower. This can lead to moldy buds and bud rot. But, it also messes with the flavor and aroma of your plants.

Now, without further ado, let’s unveil the best garden sprayers for indoor and outdoor growers alike.

What Makes The Best Garden Sprayer?

As with all our lists of the top garden supplies, we need to break down our criteria so you understand what makes the best garden sprayer.

Garden sprayers are all pretty similar for the most part, but there are some intricacies that set some apart from the pack.

For the most part, we consider construction and quality of the sprayer itself along with the emitters.

The best sprayer for gardening should have ultra fine emitters that allow the finest misting possible. This ensures the widest coverage area, so you aren't missing any spots on your foliage.

The best garden sprayer should also be light and ergonomic, as spraying the plants can be a long, cumbersome task sometimes. You might as well be comfortable while you do it!

Because you never know when you're going to need to spray, you need your equipment to be reliable. That's why on this list, you'll only see the top brands that have proven to be reputable.

What Is The Best Garden Sprayer?

We are going to help you choose the best garden sprayer for you and your grow. Our list will be broken down into four sections: manual handheld, manual backpack, electric handheld, and electric backpack.

A few things we took into consideration when creating this list are brand, build quality, capacity, weight, and reviews.

Best Manual Hand Held Garden Sprayer - The Mondi Deluxe Mist & Spray

Mondi Gardening has a variety of garden sprayers for grows of all sizes.

The Mondi Deluxe Mist & Spray has a 2.0 liter capacity, and is pump action, and we consider it to be the best hand held garden sprayer currently on the market.

This sprayer is built to last a lifetime, from premium, heavy-duty plastic. You can ensure that it won't let you down when it comes time to spray pests or apply a feeding at the foliage.

With a sprayer this size, you likely aren’t going to be spraying a ton of plants. Nevertheless, the ergonomic handle makes work easy and comfortable, so it doesn’t even feel like work!

It has an adjustable brass nozzle, and includes an extension for precise spraying and control.

This way, you aren’t wasting any expensive nutrients or pest control products!

Best Manual Backpack Garden Sprayer - Rainmaker Garden Sprayers

The Rainmaker Garden Sprayers are some of the best manual pump sprayers you can find.

Ranging in sizes from ½ gallon all the way to four gallons, there is an option for every grower out there.

What makes these sprayers so great is the included shoulder straps. These make spraying your plants effortless, turning a mundane, laborious task into an easy, pleasurable experience in the garden.

If this isn’t ideal, you can still easily carry each one with the included, ergonomic handle.

Some garden sprayers are difficult to use, particularly when filling the sprayer. This is not the case with the Rainmaker! It has a funnel top opening, making filling incredibly easy and convenient.

With other sprayers, you cannot easily see the liquid levels. This makes it tough to mix up your solutions, and tough to tell when you are getting low.

With Rainmaker garden sprayers, you can easily see liquid levels through the translucent polyethylene. This material is also super durable, ensuring your Rainmaker sprayer won’t deteriorate over time.

Rainmaker garden sprayers also have a few other features that set it apart from the competition.

For example, each one has a trigger with a lock on option which can be engaged for a continuous spray.

Plus, they include a pressure relief valve and a 3-foot hose. Here at Hydrobuilder, we carry Rainmaker Garden Sprayers in the following sizes:

Best Electric Handheld Garden Sprayer - Hudson FOG Portable Electric Atomizer

The Hudson FOG Portable Electric Atomizer 2 Gallon Sprayer is as good as it gets when it comes to foliar feeding and pest control.

It creates an ultra low volume mist, allowing for precise misting for indoor and outdoor use. In fact, the mist outputs 22-46 microns particle sizes.

Each droplet is just around 20 microns. This ensures you douse every bit of your plant with whatever it is you're spraying.

Because its an electric sprayer, you can adjust the amount you spray 1.5 - 14 gallons per hour.

The Hudson FOG electric atomizer even includes large commercial coiled hose for directing ULV chemical mist, which is capable of being sprayed up to 13.5 feet away!

Rainmaker Battery Powered Handheld Sprayer

This sprayer can be handheld, but it also has a shoulder strap.

If you are looking for something for a smaller grow, consider the Rainmaker Battery Powered Handheld Sprayer. This little guy holds just 32 ounces and is perfect for small, hobby growers.

The sprayer tip allows for a steady jet stream or adjusts to a fine mist that is gentle on plants and provides excellent coverage.

The bottle is made from heavy-duty plastic and has a clear plastic strip for easy viewing of liquid measurement levels.

Best Electric Backpack Garden Sprayer - Rainmaker Battery Powered Sprayer

Best Electric Backpack Garden Sprayer - Rainmaker Battery Powered Sprayer

Making another appearance on our list of the best garden sprayers is Rainmaker, with their 5 Gallon Battery Powered Sprayer. It features a rechargeable battery, with absolutely no pumping or manual work on your end!

What really makes this electric garden sprayer stand out is that it has wheels on it, and can easily be carted around the grow room or out in the field.

If this isn’t the best way to use it, no worries - you can simply use the attached shoulder straps, remove the carriage, and carry it like a backpack.

With a capacity of 5 gallons, this is definitely a sprayer for larger grows. It also features four interchangeable sprayer nozzles, so you can fine-tune your spray for the type of use you need.

Like the manual sprayers, this one also has a trigger with a lock-on option, which can be engaged for a continuous spray. 

The Rainmaker electric sprayer also has an integrated filter and a four-foot hose. If you want one a tad smaller, Rainmaker also has a 4 gallon 18 Volt Sprayer.

This one doesn’t have wheels, however, and is simply a backpack sprayer. This one features a high and low-speed flow rate and can last hours on a single charge.

The Best Garden Sprayers For Sanitizing Your Grow Room

In commercial grow environments, you need to routinely sanitize the space. This will protect your crop form viruses and other harmful contaminants that could alter the quality for your harvest, or worse, prove harmful to employees or anyone who consumes your crop.

In these instances, special sanitization sprayers are the ideal tool of choice. And at Hydrobuilder, we carry the best choices online!

Just because these are geared towards sanitation, doesn't mean they aren't dual purpose. These very same sprayers can also be used to apply pesticides or feed your plants.

Agrify Enozo Aqueous Ozone Sanitation Sprayer

Perhaps the most unique product on this list is the Agrify Enozo Aqueous Ozone Sanitation Sprayer.

Agrify Enozo Aqueous Ozone Sanitation Sprayer

This is one of the best garden sprayers when it comes to sanitation, as it offers toxin-free surface protection. This makes it perfect for sanitizing an entire grow room, or simple your flood tables and reservoirs.

This partnership between Agrify and Enozo allows you to kill 99.9% of harmful pathogens in the grow room without compromising the safety of your workers, plants, etc.

Because this bottle uses just water, you don't have to worry about toxic chemicals being sprayed. Yet, it can still kill most bacteria in as few as 30 seconds!

The way it works is by using an electrolytic cell that transforms typical tap water into aqueous ozone (AO). This is nature's most powerful sanitizer. And the best part is, it's completely natural!

The compact, lightweight design is perfect for spraying surfaces down. So if you're preparing a workstation for trimming or taking clones, you can quickly cleanse this area safely prior to use, preventing contamination.

This sprayer even meets FDA requirements for hard, non-porous cleaning and sanitizing. The LED indicator will notify you when the sprayer is creating ozone, along with when the battery is getting low.

It will last 10 reservoirs of sanitation per charge, and 5,000 refills per battery life! Learn more by clicking the link below.

Viruserv VH Protector Handheld Electrostatic Sprayer

Viruserv VH Protector Handheld Electrostatic Sprayer

The Viruserv brand is all about quality, and their Electrostatic Handheld Sprayer is no exception.

This small, hand held garden sprayer is the best choice for smaller tasks, or those on a budget who can't afford the backpack version (which we'll cover in a moment).

With a 90-micron median droplet diameter, you can rest assured you are thoroughly dousing every inch of your grow space. And with a spray distance of 2-3', you can work quickly and efficiently to get a mundane, tedious task done fast.

It brings a ton of other features to the table, including an electrostatic on/off switch which even further cuts into the work you have to do to spray your garden. With a 3.5 hour battery life, you won't have to worry about it shutting off mid-job - a single charge will last you multiple uses!

It can hold up to 17oz of liquid, and features an ergonomic handle to keep you comfortable.

Viruserv VB Guardian 5-In-1 Electrostatic Backpack Sprayer

Viruserv VB Guardian 5-In-1 Electrostatic Backpack Sprayer

If the technology, quality, and performance of the handheld version sounds great to you, but the smaller size just won't do, then consider the Viruserv VB Guardian 5-In-1 Electrostatic Backpack Sprayer.

This much larger 4.2 gallon sprayer weights only 9 pounds, and offers unprecedented performance in grow room sanitation and care. In fact, it can propel the spray anywhere from 4' all the way up to 18' away!

This might not sound like an important feature to you, but imagine spraying down a huge commercial warehouse grow. When you consider how long it would take to walk up and down, thoroughly dousing the whole facility, an efficient sprayer becomes even more important.

The best feature of this backpack garden sprayer is the diversity in nozzles and spray. There are three options you can choose from:

  • Cone Nozzle - offers precise application with a flow rate of 1.5 gallons/hour
  • Double Nozzle - offers twice the flow rate of the cone nozzle (3 gal/hour), and is best for disinfecting non-sensitive equipment and fixtures.
  • High-Flow Nozzle - this third nozzle has the highest flow rate at a whopping 10.5 gallons per hour, and offers more diversity in spray. You can either put out a fan mist, or a strong jet to blast something clean! Best for tall, hard to reach areas (getting the ceiling, for example.
best sprayer for gardening

Other noteworthy features of this impressive piece of equipment include a long 6-hour battery life, comfortable shoulder straps, a strong blower, and a 1-year warranty.

This is a sensible investment for any large grow room looking to spray a ton of plants quickly, or clean up their grow space at the end of harvest.

And, when coupled with the Viruserv disinfectant line of products, you can get your grow cleaner than the day you moved in.

Final thoughts on best garden sprayers

Once you have the top garden atomizer, all that's left is to grab the best insecticide or fungicide for the issue you're dealing with. Our complete review is the best place to find that information!

If you have any questions about one of these garden sprayers, or any other product on our site, give our expert growers a call at 888-815-9763.

A garden sprayer is just one of the many supplies or pieces of equipment you need in your grow room or garden.

Here at Hydrobuilder, we carry everything you need to tend to your plants and get the biggest yields possible. You can view all of our garden care products here!

Have questions about your grow? We're Here To Help!

Our Northern California based experts can help. We're here to make sure you get what you need to maximize your harvest.

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