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Writer's pictureAndy Hemmer

Diatomaceous Earth in Landscaping

Updated: 4 days ago


doing landscaping work

Landscaping is both an art and a science, requiring thoughtful planning to create an environment that is not only beautiful but also sustainable and low-maintenance. Diatomaceous earth (DE) is a natural, eco-friendly material that can play a vital role in improving your landscaping efforts. From pest control to soil enhancement, DE offers numerous benefits for your garden and outdoor spaces.


In this article, we’ll explore the various applications of diatomaceous earth in landscaping and provide practical tips to help you make the most of this versatile product.



 


What Is Diatomaceous Earth?

diatomaceous earth

Diatomaceous earth is a naturally occurring, fine powder made from the fossilized remains of diatoms, a type of algae. It is rich in silica and has unique properties, such as high absorbency, abrasive texture, and non-toxicity, which make it a valuable resource for landscaping.


Types of Diatomaceous Earth


  • Food-grade DE: Safe for use around people and pets, commonly used for pest control in gardens.


  • Filter-grade DE: Used in filtration for various industries to help draw out impurities



 


Benefits of Diatomaceous Earth in Landscaping

landscaped garden

1. Natural Pest Control

Diatomaceous earth works as an effective solution for managing pests like ants, slugs, beetles, and aphids. Its abrasive particles damage pests' exoskeletons, causing them to dehydrate and die.


2. Soil Improvement

When added to soil, DE enhances water retention, aeration, and nutrient availability, promoting healthier plant growth.


3. Eco-Friendly Solution

DE is a natural, biodegradable product that does not harm the environment, making it a sustainable choice for landscaping projects.


4. Mold and Fungus Prevention

The absorbent properties of DE help reduce moisture levels in soil and mulch, minimizing the risk of mold and fungal growth.


5. Safe Around Pets and Wildlife

Food-grade DE is safe for use in areas frequented by pets, birds, and beneficial insects like bees and butterflies.



 


Applications of Diatomaceous Earth in Landscaping


1. Pest Control


  • Around Plants: Lightly dust DE around the base of plants to deter crawling insects such as slugs and snails.


  • On Leaves: Dust plant leaves with DE to protect them from aphids and other small pests.


  • In Pathways and Borders: Apply DE along garden paths and borders to create a natural barrier against ants and other pests.


2. Soil Amendment


  • Water Retention: Mix DE into sandy soils to improve their ability to retain water.


  • Aeration: Incorporate DE into clay soils to enhance aeration and reduce compaction.


  • Nutrient Boost: DE adds trace minerals like silica to the soil, promoting healthier plants.


3. Lawn Care


  • Pest Control: Spread DE over your lawn to eliminate grubs and other pests that can damage grass roots.


  • Moisture Management: Use DE to help absorb excess moisture in soggy areas of your lawn, preventing fungal diseases.


4. Mulch Treatment


Dust DE onto mulch to discourage pests and prevent mold growth. It can also help mulch retain moisture for longer periods.


5. Pathways and Hardscapes


  • Weed Prevention: Use DE in gravel or paver pathways to deter weeds.


  • Anti-Slip Properties: Sprinkle DE on wet paths to create a non-slip surface during rainy seasons.



 


How to Apply Diatomaceous Earth in Landscaping

applying diatomaceous earth to garden

1. Choose the Right Type of DE


  • Use food-grade DE as a soil amendment, moisture control, and water retention within soil




  • Use Crawling Insect Control DE for controlling garden pests in your landscaping, gardening, and mulch.


  • Do not use Pool grade or Filter grade DE as they are primarily used in pool filters and is toxic to humans and animals.



2. Apply in Dry Conditions


DE loses its effectiveness when wet, so apply it on dry soil or foliage for the best results.


3. Use Proper Tools


  • For even application, use a duster, shaker, or small sieve. We also recommend a dust mask to help protect you from inhaling the dust.



  • Wear a mask to avoid inhaling the fine powder.


4. Reapply as Needed


  • Reapply DE after heavy rain or watering, as moisture washes it away.


  • Monitor pest activity and soil conditions to determine when to reapply.



 


Safety Tips for Using Diatomaceous Earth in Landscaping


  • Avoid Inhalation


    • While DE is non-toxic, inhaling its fine particles can irritate the respiratory system. Wear a dust mask during application.


  • Store Properly


    • Keep DE in a sealed container in a cool, dry place to maintain its effectiveness.


  • Limit Application on Wet Surfaces


    • Wet DE is less effective and may clump, reducing its ability to control pests or improve soil.


  • Protect Beneficial Insects


    • Avoid dusting DE on flowers or areas frequented by bees and other pollinators.



 


Enhancing Sustainability in Landscaping with DE

family enjoying their yard

Using diatomaceous earth in landscaping aligns with sustainable practices by reducing the need for chemical pesticides and synthetic fertilizers. Its natural properties not only support a healthier ecosystem but also promote long-term soil health and plant vitality.


Incorporating DE into your landscaping plan is a simple yet effective way to create a beautiful, eco-friendly outdoor space.



 


Conclusion


Diatomaceous earth is a versatile and sustainable solution for many landscaping challenges. From controlling pests and improving soil quality to enhancing moisture management and promoting plant health, DE is a valuable tool for any gardener or landscaper.


By choosing this natural, eco-friendly product, you can maintain a thriving landscape while supporting the environment.


Have you used diatomaceous earth in your landscaping projects? Share your experiences or tips in the comments below!

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