diatomaceous earth for fleas on cats

Diatomaceous Earth For Fleas On Cats – Is It Really Any Good?


Updated April 2019

Flea season has arrived!

What is diatomaceous earth and how does it control fleas?  ​

This is what it looks like. 

This is what diatomaceous earth looks like

It looks like powder

Using diatomaceous earth is one way to ​ control fleas using a non chemical method of flea control for your cat. So far so good, no chemicals.

It is going to take a little more effort on your part than just putting a flea collar on your cat or applying flea drops. However, this is a​ chemical free option for your cat which can also be used to get rid of fleas from around your home. Plus you can use it on the dog too.

Note the little bit more effort part though. More about that in a minute.

You may choose to use diatomaceous earth in conjunction with other ​natural methods of flea control​​. Good idea!

In a hurry? Head straight to Recommendations (link ​below) for a quick summary of our ​recommendations.

What is Diatomaceous Earth?

Diatomaceous earth is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder.  The powder can have an abrasive feel, similar to pumice powder.

It looks like powder but is actually a mineral dust.

Melos - Diatomaceous earth

​This is Sarakiniko Cove on the island of Melos in Greece.  The white mineral dust that looks like beach sand is Diatomaceous Earth.

How Does Diatomaceous Earth Kill Fleas?

Diatomaceous earth is made up ​of diatoms which are the fossilized remains of a type of algae. It is the diatoms that scratch away at the waxy layer of the exoskeleton of the flea. Moisture from the body of the flea evaporates and the flea dehydrates and dies.

bag of diatomaceous earth

Diatomaceous Earth is usually purchased in resealable bags or large screw top plastic containers.

Should I Apply Diatomaceous Earth Directly On My Cat?

This video shows how to apply diatomaceous earth to your cat.

​Use a squeeze bottle as shown. This ensures small amounts are puffed out as needed. This ​means less wastage and you and the cat will not be covered in or inhaling dust.


Does Diatomaceous Earth Work For Killing Fleas?

It does work, bear in mind that you will need to be vigilant about treating areas around the home plus places like the scratching post and other places the cat likes to ​hang out.


​Cats that spend time outdoors should be treated weekly and indoors cats, ​monthly.

​Diatomaceous Earth Reviews

​All of the products reviewed here are 100% food grade. This is what you ​must use if you are using it for treating fleas on your cat. 

Diatomaceous earth that is not food grade is a very effective insecticide however as this article is specifically about cats, only 100% food grade products will be reviewed.


Where Do You Get Diatomaceous Earth?

Buying diatomaceous earth online is convenient because the larger bags are pretty heavy and you can avoid the heavy lifting to and from the store by having it delivered. ​Once you have the bag at home the product can be decanted into smaller more manageable containers. Always look for the Food Grade label.

​Harris Diatomaceous Earth - Powder Duster Included

This is a ​4lb bag. It has no additives and as a bonus includes the powder duster which is actually in the bag with the diatomaceous earth. The duster may settle near the bottom of the bag. The duster is handy when applying diatomaceous earth directly to the cat and also for puffing the dust into small spaces.
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As a precautionary measure use a mask when using large quantities of the product as it can be dusty. This advice applies to any diatomaceous earth product. Avoid using diatomaceous earth on windy days.

Harris donates 10% of its profits to the Etowah Valley Humane Society, a non profit organization that saves thousands of animal lives each year. This product is OMRI listed which means that ​it has been reviewed against organic standards.

Fossil Power - Diatomaceous Earth Food Grade Powder

This product ​is available in a 12 lb, 2 lb and 5 lb bag. The link goes to a 5 lb bag so if you need a different size remember to change the size of the bag. There are no additives or chemicals in this product.

Dust onto your cat's fur. Using a spreader or applicator makes the application much easier. Think powder and you will have the general idea. You may have something else at home such as a squeezy plastic bottle ​that could be used as a dust applicator.

Use as directed and take precautions if applying on a windy day and take reasonable precautions to avoid ingesting the powder during application.​

​Diatomaceous Earth 5 Lbs ​

​This product is listed by OMRI ​and has been reviewed against organic product standards. It has no additives or contaminants and is packaged using stainless steel machinery.

Sprinkle in infested area and in nooks and crannies. Treat the cat , following the directions in the video.  The insect needs to crawl over the powder for it to work effectively.  This is the reason ​sprinkling the powder on cat bedding, carpeted cat trees and so on is recommended.

This product is 100% diatomaceous earth and is food grade.

Nature’s Wisdom say that this product is sourced from a food grade deposit that has pure water. The diatoms (that make up diatomaceous earth ) are harder from pure water supplies than ones found where the water supply is salt water.


Diatomaceous Earth treats many other types of troublesome bugs, plus bed bugs in addition to fleas. As mentioned earlier, this is a fine powder so be sure to empty the filter of the vacuum cleaner regularly when using this product as the fine powder may clog the filter.

​This product is in a plastic container as pictured.  The product also comes  in a plastic bag so there are refill options or you may prefer to buy in a plastic bag and recant into your own container.


Diatomaceous Earth Spreader/Applicator


The spreader by Harris is specifically for diatomaceous earth. This applicator is included with some of the Harris products like the one shown on this page.

Harris Diatomaceous Earth Powder Duster

This handy little product makes spreading diatomaceous earth so much easier.
Simply twist the top, fill with powder and it is ready to use. Apply gentle pressure when squeezing and the product will puff out. The long nozzle means that you can get into all those tricky spots that are difficult to reach. The powder will go where you want it to go ​with this product.
If it starts to clump just turn upside down and give a little shake.

Depending on the amount of pressure you give when squeezed will affect the amount of powder coming out. Experiment with different pressure to get it just right for your needs.

How Is Diatomaceous Earth Used Around The house To Control Fleas?


​In addition to using diatomaceous earth on your cat to control fleas you can also use diatomaceous earth in your home to get rid of fleas. Sprinkle the dust lightly in all the places your kitty likes to hang out and don’t forget all the nooks and crannies.

When applying the dust to tight spaces, an applicator is a good idea and will ensure you don't sprinkle more dust than you need.

Don't forget to dust the scratching post because as this is covered in carpet it will be a lovely home for fleas. Work the dust into the carpet with a brush. Vacuum the dust approximately 12-24 hours later and reapply as necessary.

Be mindful of the fact thatdiatomaceous earth can be hard on a domestic vacuum cleaner so be sure to check the filter and vacuum small areas at a time.

It is non toxic to humans (using the food grade diatomaceous earth ) however it is still a dust and it is advisable to just take a normal amount of care to ensure that you are not breathing in volumes of the dust.

​​A Cheeky​ Method ​​Of Applying Diatomaceous Earth To Your Cat

Our Recommendations

Harris Diatomaceous Earth

Harris is a trusted company that makes an absolutely top quality product and is ​our first product of choice.

The included applicator makes this product an excellent ​purchase.  It is a food grade​ product.

Harris also donates part proceeds from profits to a non profit animal rescue organizations.


​Nature's Wisdom

A plastic tub as used in ​​Nature's Wisdom is ​convenient for ease of handling, as opposed to a softer sided bag. It is also available for purchase in plastic bags as are other food grade diatomaceous earth products. ​Future product purchase​d in a plastic bag can be decanted into the plastic container ensuring that the container is reused.


natural cat flea treatment options

​There are more ideas here that incorporate natural methods of flea control​. ​Whether you choose a chemical option or natural ​option is your choice.  It is our job to give you the information to make an informed choice.

Diatomaceous Earth and Fleas