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Writer's pictureAndy Hemmer

How to Use Diatomaceous Earth

Updated: 4 days ago


diatomaceous earth

Diatomaceous earth (DE) is a versatile, natural product derived from the fossilized remains of diatoms, a type of microscopic algae. Known for its fine, abrasive texture and absorbent properties, DE is a popular choice for a wide range of applications, from pest control to personal care. Whether you're a homeowner, gardener, or health enthusiast, understanding how to use diatomaceous earth effectively can help you maximize its benefits.


In this comprehensive guide, we’ll explore the many uses of diatomaceous earth, how it works, and step-by-step instructions for safe and effective application.



 


What Is Diatomaceous Earth?


Diatomaceous earth (DE) is a soft, powdery substance made of silica, a naturally occurring mineral. Its porous structure and abrasive quality make it highly effective for applications requiring absorbency, exfoliation, or physical pest control.


Types of DE


  1. Food Grade Diatomaceous Earth: Safe for human and pet use, food storage, and personal care.


  2. Crawling Insect Control DE: Used specifically as a safe and natural way to kill insects.


  3. Pool Grade DE: Used for filtration purposes in industrial settings and pools. Super toxic to humans and animals.



 


How Diatomaceous Earth Works

diatomaceous earth

1. For Pest Control

DE kills pests by damaging their exoskeletons. The sharp particles pierce through the outer layer, causing dehydration and eventual death. Apply a just visible, fine layer to locations where insects are at.


2. For Absorption

DE absorbs moisture, making it useful for controlling damp environments, cleaning spills, and deodorizing.


3. For Health and Personal Care

Silica in food-grade DE supports skin, hair, and nail health, and its texture makes it a natural exfoliant.



 


Uses of Diatomaceous Earth


1. Pest Control

DE is an effective, non-toxic solution for managing common household and garden pests such as ants, cockroaches, fleas, bed bugs, and slugs.


2. Gardening and Agriculture

It improves soil structure, retains moisture, and helps manage pests without harming beneficial insects.


3. Home Maintenance

DE is excellent for deodorizing, absorbing spills, and preventing mold in damp areas.


4. Personal Care

It can be used in DIY face masks, scrubs, and as a gentle toothpaste alternative.


5. Food Storage

Food-grade DE protects grains and legumes from pests by creating an inhospitable environment for insects.



 


How to Use Diatomaceous Earth Safely

diatomaceous earth applied to potted plant

1. Choose the Right Type

Always use food-grade DE for applications involving people, pets, or food. Industrial-grade DE should be reserved for outdoor or non-contact uses.


2. Apply in Dry Conditions

DE loses effectiveness when wet, so ensure surfaces or soil are dry before application. The crazy thing is you can apply diatomaceous earth as a wet application. It eventually dries and sticks to the locations you sprayed it on. Take 1 cup of diatomaceous earth and mix with 1 gallon of water to make a slurry. Apply to plants, in-house, crawl spaces, and any other area you want a fine application.


3. Protect Yourself During Application

Wear a mask and goggles to prevent inhaling the fine powder, which can irritate the respiratory system.



 


Step-by-Step Instructions for Using Diatomaceous Earth


1. For Pest Control


  • Indoor Application:

    • Sprinkle DE in areas where pests are active, such as cracks, baseboards, or under appliances.

    • Leave it for 48 hours to 1 week and then vacuum the area.


  • Outdoor Application:

    • Apply DE around the foundation of your home, in garden beds, or directly on pests.

    • Reapply after rain or watering.


2. For Gardening


  • Soil Amendment:

    • Mix DE into the soil to improve water retention and aeration.

    • Use 10% DE by weight for best results.


  • Pest Control:

    • Dust DE on leaves and around plants to deter insects like aphids and slugs.


3. For Food Storage


  • Add a thin layer of food-grade DE to stored grains or beans to keep them pest-free.

  • Use approximately 1 cup of DE for every 25 pounds of stored food.


4. For Personal Care


  • Face Mask:

    • Mix 1 tablespoon of DE with water or aloe vera to create a paste. Apply to your face and rinse off after 10–15 minutes.


  • Toothpaste Alternative:

    • Combine DE with coconut oil for a natural, gentle cleaning paste.


5. For Home Maintenance


  • Deodorizing:

    • Sprinkle DE on carpets, pet bedding, or in shoes to absorb odors. Vacuum or shake off after a few hours.


  • Moisture Control:

    • Place DE in damp areas, such as basements or closets, to prevent mold growth.



 


Tips for Maximum Effectiveness

diatomaceous earth
  • Use Sparingly: A thin, even layer is sufficient for most applications.

  • Reapply as Needed: DE needs to be reapplied after it becomes wet or is cleaned away.

  • Store Properly: Keep DE in a sealed, dry container to maintain its effectiveness.

  • Monitor Results: Regularly check treated areas and reapply DE as necessary to ensure continued effectiveness.



 


Frequently Asked Questions


Is diatomaceous earth safe for pets?

Food-grade DE is safe for use around pets. It can even be used to treat fleas when applied to their bedding or directly to their fur (avoid the face).


Can diatomaceous earth harm beneficial insects?

DE can harm beneficial insects if applied directly. To minimize impact, use it selectively and avoid dusting flowers where pollinators feed.


How long does diatomaceous earth remain effective?

As long as it remains dry, DE can be effective indefinitely. However, it should be reapplied after rain or cleaning.



 


Conclusion


Diatomaceous earth is a natural, eco-friendly product with a wide range of uses in pest control, gardening, home maintenance, and personal care. By understanding how to use it effectively and safely, you can harness its many benefits while protecting the environment and your health.


Whether you're eliminating pests, improving your garden, or creating DIY skincare products, diatomaceous earth is a versatile and powerful tool for everyday challenges.


Have you tried using diatomaceous earth? Share your tips and experiences in the comments below!




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