Best 21 Inch Mulching Blade

It’s a bright and sunny day, and the only things that are holding back the beauty of your lawn are those messy grasses.

So, you take matters into your own hands and start the lawnmower. But what’s that? The regular blades seem to be unable to cut the smaller grasses.

You’ll need a 21 inch mulching mower blade in such scenarios because it is made for cutting fine/short grass. Not just that, such mulching blades can also fertilize your lawn at the same time. Something the regular ones can’t do.

As they are complex, we also took matters into our own hands and gathered some of the most fantastic 21 inch mulching blades that will enrich your lawn and restore its beauty for sure.

Best 21 Inch Mulching Blade

At a Glance:

Maxpower 21
Maxpower 21″ Commercial Mulching Blade
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MTD Genuine Parts Replacement Mulching Blade
MTD Genuine Parts Replacement Mulching Blade
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EGO Power 21-Inch Lawn Mower High Lift Blade
EGO Power 21-Inch Lawn Mower High Lift Blade
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Husqvarna Replacement Lawn Mower Blade For 21-inch
Husqvarna Replacement Lawn Mower Blade For 21-inch
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The 6 Best 21 Inch Mulching Blade

The mulching blades we gathered over here are specifically 21 inches because this size can perfectly do three things in one go.

Now you can discharge, bag, and mulch grass at the same time. Pretty neat if you ask us. So, before you settle down for one, take a detailed look at these blades.

Maxpower 21″ Commercial Mulching 2-Blade Set

Maxpower 21 Commercial Mulching 2-Blade Set

So you want a blade that will turn your regular lawn mowing into something that even the neighbors can’t resist watching?

First, let’s just talk about how affordable it is. You can get two blades at the price of one. But being affordable does not mean the quality is cheap.

No matter what weather conditions you are working under, these blades will deliver every time.

Not only durable, but the blades are also super sharp as well. And since you are using two blades, the grasses will have more delicate cuts. So these blades will definitely give you better performance than the stock blades.

We all know how much the RPM matters. A blade that decreases the rpm is a blade you should avoid. These blades ensure a secure fit. This is why it does not affect the rpm of your mower.

The bonus is that you will get a very aggressive noise when you use these blades. Not too loud, not too quiet. This improves the overall experience.

So, if you want to Transform your gas-guzzling, grass mulching machine into the envy of your neighbors, the Maxpower 561713XB will be a fantastic choice.

Highlighted features:

  • Get two blades at the price of one.
  • Preserves the RPM rate of your mower.
  • Fits securely in a wide range of machines.
  • Aggressive noise.
  • It can be used under any weather conditions.

Maxpower 331528b – Best Mulching Blades for Husqvarna

Maxpower 331528b Mulching Blade For 21 Inch Cut

Affordability, top-notch performance, and a neat balance. These are the things everyone wants from a mulching blade. So, keeping it in mind, we are starting our list with troy bilt 21 inch mulching blade.

One problem everyone faces is the fitting. It would be a shame if you buy a blade and it ends up not fitting in your lawnmower.

This is why Maxpower has designed the blade to fit a wide variety of mowers, including models from Poulan, Husqvarna, and Craftsman.

The blades are sharp enough to cut even the toughest grass. But, that’s not all. It also has an outstanding balance.

We all know how important it is when using a mower. But, your lawn does not have any chance against this beast.

One slight issue, though. The blade comes with stickers, and that can create balancing problems. So you have to peel off the sticker before installing the blade.

The best thing about this blade is that it eliminates chute clogging. Well, not entirely, but enough to speed up your work.

The Maxpower 331528B 21 mulching blade easily outclasses most of its competitors in price, performance, and durability despite having a minor issue.

Highlighted features:

  • Flexible enough to fit on a wide range of mowers.
  • Highly durable and sharp blades.
  • Eliminates chute clogging.
  • Pocket-friendly price tag.

MTD Genuine Parts Replacement Mulching Blade for 21-Inch Cutting Decks

MTD Genuine Parts Replacement Mulching Blade

If you live in a wooded area, you know mowing can be very troublesome. Rocks, tree branches, and lots of other things can come in contact with your blade and cause it to break.

Keeping that in mind, we have brought you a strong enough blade to withstand such issues. The MTD mulching blade is made out of heavy-duty metal. So even if you hit rocks or parts of trees, the blade will still be intact.

That’s not all. Unlike other dry weather blades, you can use this one in any weather conditions. So let it be an early morning job or a post-rain cut. This blade will be there for you.

There is one drawback, though. The blade needs occasional sharpening. And the sharpening process can take a bit of time which can be annoying to some people.

This is because the blade comes with a protective coating for long-lasting performance. So, this is a trade, and you should do it.

We all know performance and longevity come at a price, and if you have the budget, this 21 inch mulching mower blade will be an excellent option for rough terrains.

Highlighted features:

  • Made out of tough duty metal.
  • It can be used on rough lawns.
  • The blade is durable enough to be used in any weather conditions.
  • Has a protective coating for longevity.

EGO Power 21-Inch Lawn Mower High Lift Blade

EGO Power 21-Inch Lawn Mower High Lift Blade

Maybe you don’t want to mulch; maybe you just want a blade expert in bagging. If you are looking for such blades, you’ve hit the jackpot.

The blade is sharpened from the factory for excellent cutting performance. So, you can bet it will be able to cut any sort of grass you mow over.

It is a big upgrade over your stock blades that came with the lawnmower. The first improvement you will notice is that it can bag the grass clippings better than any other blades. No more leftover grasses on your lawn from now.

The second improvement is that it pulls more of the bentgrass blades upwards, resulting in a sharper and even-looking lawn when finished mowing.

Although the manufacturers say that it is only made for bagging, we are sure that it also improves the mulching performance of your lawnmower. But don’t expect too much.

The suction of the blade is also better than any other blade on this list. Not only does it suck all the grass inwards, but it can suck pine cones that other blades aren’t able to do.

One quick reminder is that it uses 25% more battery than stock blades because of the rapid suction capability.

Despite using more battery, the EGO power+ blade is still a fantastic lawnmower blade 21 inch for beginners and pros alike.

Highlighted features:

  • Factory sharpened steel blade for excellent cutting performance
  • Strong grass suction capability.
  • Can bag and mulch at the same time.
  • Delivers a clean lawn cut.

Oregon 100 Series 21 Inch Lawn Mower Blade

Oregon 100 Series 21 Inch Lawn Mower Blade

Some people prefer the aggressive noise of the blades, and some people prefer a quieter noise. If you prefer the latter, then we have just the thing for you.

The blade is made out of boron steel. This type of steel is one of the best materials when it comes down to durability. So, don’t worry about how thick or tall the grasses are.

As we said earlier, this blade will reduce the noise that you get from the machine. But, this does not mean it slows down the RPM of the lawnmower. So, don’t worry, you will get the maximum RPM.

Furthermore, the blade is sharpened with double bevel technology. This will ensure that you get as tiny grass clippings as possible. Which means your lawn won’t get messy after a cut. The grass clippings will be barely visible.

Easily the best thing about this blade is that it comes with an anti-corrosion coating, keeping your blades rust-free for a long time.

But, since it has rust protection, the blades are a bit dull out of the box. This is why you should give it a quick sharpening before installing for better cutting power.

In conclusion, if you are not an enthusiast and want something that will do the job without any hassle, the Oregon 198049 100 series blade is the right choice.

Highlighted features:

  • Made out of boron steel for extra durability and performance.
  • Low noise output.
  • A sharp blade that can cut anything.
  • Rust protection coating.

Husqvarna Replacement Lawn Mower Blade For 21-inch

Husqvarna Replacement Lawn Mower Blade For 21-inch

So, you are too busy to maintain your lawn regularly, and because of that, it’s losing its charm. What you need is a lawnmower blade that can help fertilize the grass.

The curved blade design helps the grass clippings move in a round motion into the mower deck. Because of this, the grass gets cut into really tiny bits.

Remember when we said this blade could help fertilize the lawn? When the grass clippings get cut into fine pieces by the sharp edge blade, it gets pushed back into the lawn.

The fine clippings rot and help the grass get nutritions from it. This makes your lawn healthier and cleaner.

Unlike other blades made for specific models, this blade can fit a wide range of models, including Husqvarna, Poulan, Poulan Pro, Roper, Sears/Craftsman, and Weed Eater. So, less worry about installation and more concentration on the lawn.

This is the only blade on our list that comes with a one-year warranty. So if the blade malfunctions or has any defects, you can just return the product and get a new one.

So, if you have a bit of extra cash lying around and also want to make your lawn healthier, Husqvarna 21 inch mulching blade is the best deal you can get.

Highlighted features:

  • It can be installed on a wide variety of lawnmowers.
  • Will provide fertilizers for your grass.
  • Comes with a 1-year return warranty.
  • Curved blade design helps cut grass into small pieces.

21 Inch Mulching Blade Buying Guide

The blade you are using is as important as the lawnmower itself. No matter how expensive or great your machine is, if the blade sucks, you won’t get a satisfying result.

And to get an excellent mulching blade, you have to keep some crucial aspects in mind before buying.

Below are a few things that will make you an expert in buying mulching blades overnight (not joking).


The first and foremost crucial thing is to check whether the blade you are buying will fit inside the mower.

Looks can be deceiving. You might think that “oh this one looks exactly like the one I used,” but most of the time, even if it looks like your old blade, it won’t fit.

So, always check if the blade fits precisely the model of mower you have. In addition, also check if your engine can carry the weight of the blade. If it can’t carry the weight, it won’t deliver the power needed for a proper cut.

Blade size

Most people think that the size of the blade is not essential, but we beg to differ. The blade size will determine how much grass you can cut in one go. It also determines how much area you can cover.

If you buy a smaller blade than your mower can handle, you will get less work efficiency. This is because a smaller blade won’t be able to cover a good amount of area. Thus, you will have to work more than you were supposed to.

But bigger is not necessarily better either. If you buy a bigger blade than your machine can handle, it will result in low RPM.

RPM means rotation per minute. We use this to determine how fast a mower can cut. What’s worse is that you might not even be able to fit it inside the mower.

This is why we have reviewed 21 inch mulching blades because these are the ideal ones.


You won’t call a mechanic just to install the blades on your lawnmower, would you? It’s an easy task, and it should stay that way.

Always check if the blade is easy and straightforward to install or not. It would be best if you went for something which you can attach yourself without any hassle.

Oh and, before you buy a blade, check what type of mounting fit it has. Six-point stars and five-point stars are the most common ones.

You will find what shape mounting you have on the spindle of your mower. Buy a blade that matches the mounting shape of your mower.

Protective coating

This is a bit obvious but important nonetheless. Almost every blade comes with a rust protective coating, but there is no harm in making it sure before buying, is there?

An anti-corrosion coating, as the name suggests, is a coating that protects your blades from rust.

As we know, grass can sometimes be wet, and when the metal comes into contact with water, it starts to rust. So if you want longevity, you should check this.

But the problem is, if your blade has a protective coating, there’s a big chance that it won’t be much sharp out of the box.

This is why you have to sharpen the blade before installing. But don’t sharpen the whole blade as it will remove the protective coating.

Deck size

The deck size is not directly related to the size of the blade, but it is essential. Therefore, you have to consider the size of the deck before buying a blade (or a pair).

For example, if you have a 42-inch deck, you can get two 21 inch mulching blades. This does not mean that you can’t get 21 inch blades for bigger decks. But it is optimal to get the accurate size.

How To Install Mulching Blades On Lawnmowers?

Whether you just bought a new blade or just took out the old one for sharpening, it is important to know how to install mulching blades because there is a 50-50 chance of doing it the wrong way.

In this part, we will guide you through a quick step-by-step process of installing mulching blades. So without wasting any more time, let’s dive right in.

Things you will need:

  • Heavy-duty protective gloves.
  • A ratchet.
  • A block of wood.

Step 1 – preparation

Firstly, disconnect the spark plug wire and remove any bag or collector attached to the machine.

Then flip the lawnmower sideways so that you can access the bottom. Be gentle while doing this. Now wear a pair of gloves and move to the next step.

Step 2 – inspecting the blade

This step is very important, so follow it carefully. You have to always mount the blade the right way to get the best possible performance. The bottom side of the blade has to face the ground.

Many blades have “bottom” labeled on them but don’t worry if your one does not have it. Almost all the blades come with stickers. That is the side that should face the ground.

Step 3 – dismounting and mounting

This is a fairly straightforward step. All you’ve got to do is dismount the existing blade and remove it. Skip it if you don’t have any blade installed already.

Now put the new mulching blade aligning with the blade spindle. Insert the nut and tighten it with a ratchet.

Keep tightening it until it fits firmly. If the blade keeps rotating while you use the ratchet, place a wood block between the end of the blade and the frame’ deck. This will prevent the blade from turning.

When there is no wobble in the blade, you can stop tightening.

Step 4 – finishing it all up

Now all you have to do is remove the piece of wood, flip the lawnmower upright and connect the spark wire. After doing all of this, you can finally test your new and shiny mulching blades. Best of luck.

Frequently Asked Questions

Q: How often do I have to replace my mulching blades?

A: This depends on how you use the blades and the quality. For example, if you have a good quality blade and use it only on your lawn, you have to replace it once a year. But if you use it for commercial purposes, then twice a year is recommended.

Q: When should I sharpen my mulching blades?

A: The rule of thumb is to sharpen new blades before installing them for maximum performance. But you can sharpen them once you notice a decrease in cutting power.

Q: Which is better between mulching blades and regular blades?

A: It depends on what you intend to do. For example, if you want to bag your grass clippings, then a regular blade is recommended. But if you desire to enrich your lawn with fertilizers, mulching blades are the way to go.

Q: Can mulching blades fit any mower?

A: Most of the mulching blades will fit just about every mower but, the question is, should you? Mulching needs high power, which some old mowers can’t provide.

Q: Can mulching blades bag grass clippings?

A: The answer is 100% no. Bagging needs medium to high lifting power. Mulching blades have low to almost zero lift, so there is no throwing power. Thus, the grass clippings are unable to enter the bag.

Final Words

Whether you are a hobbyist who loves to take care of their lawn or a commercial worker whose job is to deliver perfect cuts, if the regular blade isn’t working, there is no other alternative to a 21 inch mulching mower blade.

Who wouldn’t want to cut their grasses into fine bits and provide nutrition for the ground simultaneously, right?

People who don’t use mulching blades often complain about how messy and unhealthy their lawn looks. Of course, we know how frustrating it is to see your precious lawn appear dull.

So, if you want to keep your lawn beautiful and the reason for your neighbor’s envy, it is time to switch from regular and boring blades to efficient and powerful mulching blades.

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