13 Benefits of Using Diatomaceous Earth for Gardens

Today, many farmers and gardeners are aware of the environmental benefits of using organic products like diatomaceous earth (DE).

Diatomaceous earth has been known since antiquity as a natural pesticide and for its many health-giving properties [1].

The widespread use of chemical pesticides harms bees and other essential pollinators. As a result, public awareness has emphasized the need to return to organic methods.

Here’s how to use diatomaceous earth in the garden for pest control.

1. All-Round Natural Pesticide

The most crucial benefit of DE is that it is a general, non-toxic pesticide. This powdery substance consists of crushed, fossilized shells of diatoms.

It works against many insect pests. It dehydrates and kills those that come into contact with it.

Apart from those listed below, insects and related pests that diatomaceous earth kills include:

• Mites
• Leaf miners
• Lice
• Chinch bugs
• Squash bugs
• Earwigs
• Mealybugs
• Crickets
• Scales on plants
• Boxelder bugs
• Cockroaches
• Harlequin bugs
• Caterpillars
• Pill bugs
• Grasshoppers
• Sow bugs
• Leaf-footed bugs
• Bald-faced hornets
• Japanese beetles
• Bed bugs
• Sawflies
• Lily leaf beetles
• Thrips
• Fig beetles
• Grubs
• Kissing bugs
• Silverfish

However, if used wisely, DE won’t harm bees, other pollinators, or earthworms that help the soil.

2. Keeps Away Maggots

A compost heap in the garden brings joy to gardeners.  The downside of the compost heap is that it may harbor many unwanted maggots and other creatures.

However, a little diatomaceous earth added to the mix can rid the compost of maggots. The product will cut up their soft bodies, killing them.

3. Deters Slugs

Spreading a layer of DE outdoors, around ornamental plants and vegetables, will repel slugs.

This abrasive powder will meet slugs that attempt to cross the barrier. The sharp edges will irritate their bodies, causing them to leave the area.

4. Ant Control

Although most ants are helpful in the vegetable garden, swarms are a nuisance. Ant hills damage lawns, and red fire ants can bite or sting. However, dusting with DE will destroy ant nests and trails.

Adding diatomaceous earth to potting soil and around garden beds will help keep ants away from plants. Additionally, sprinkling it around the house will help prevent them from entering your home.

5. Repels Flies

Flies, especially tiny black flies, can be a menace in the garden and yard. House flies are also nuisance pests.

DE will kill flies. It deals with this problem by dehydrating them as they absorb the powder. Thus, sprinkle it on and around plants and surfaces where flies crawl.

6. Eliminates Aphids

Aphids feed on plants, causing them to wilt. They can also stunt growth and cause other damage.

Coating affected plants with diatomaceous earth spray will help with aphids.

7. Gnat Control

There are several types of gnats. Each group gathers and swarms in “clouds” around moist areas and rotting fruits and vegetables.

Some bite, some don’t. However, you can consider gnats a nuisance, especially as they often migrate into the house and onto houseplants.

Dusting DE over the topsoil of potted plants will kill fungus gnat larvae and prevent or limit re-infestation.

Furthermore, you can make a diatomaceous earth foliar spray to repel the adults. The recipe is below.

8. Ticks and Fleas

Pet owners know that fleas and ticks are a big problem. This is even truer as these pests become resistant to some treatments.

These bloodsucking pests pose many serious health problems. They can also attach themselves to humans, pets, and farm animals.

Thick shrubbery, tall grass, and piles of yard clutter harbor these critters.

However, dusting your pet’s fur with DE can kill fleas, ticks, and other parasites. Additionally, feeding dogs and cats diatomaceous earth may help destroy worms internally.

9. Get Rid of Wasps and Hornets

These insects have an eco-friendly role in the garden, but large numbers can become a nuisance.

Their stings are especially troublesome for children, pets, and the gardener at work.

DE applied near swarms will deter and even kill wasps and hornets that come into contact with it. They may also take the powder back to their nests.

10. Vermin Deterrent

Rodents, like mice and rats, can cause extensive damage in the garden. Moles are notorious for digging tunnels in lawns, and rabbits will quickly eat through the nurtured vegetable patch.

Catching them may be difficult, and trapping them may be distasteful to some gardeners. However, diatomaceous earth can effectively deter them.

Some gardening experts suggest adding strongly scented oils like peppermint or lemon that DE can easily absorb. This should further discourage vermin.

11. Good for Pot and Greenhouse Plants

Diatomaceous earth is a porous substance. When added to fertilizer and soil, it can help aerate the soil and nourish plants. It is also beneficial for improving drainage.

12. Deodorizer

Flower gardens are delightfully fragrant places. However, all gardens have some smelly corners that need attention.

Spray DE around the compost heap and trash cans. You can also use it at the favorite toilet patch for household pets to deodorize these areas.

13. Preserves Flowers

A dusting of DE is another way to save short-lived spring and summer flowers. It helps by drying and preserving them.

How to Apply Diatomaceous Earth in the Garden

One of the most significant benefits of using diatomaceous earth for plants is that the product is non-toxic.

It works just as well as Sevin for pest control but is non-toxic and safer. But still, take precautions when mixing, spreading, or spraying.

Below are some tips on how to apply diatomaceous earth to plants.

• Always buy food-grade diatomaceous earth for use in homes and gardens.
• A face mask is advisable, as DE can irritate your lungs if inhaled. Also, when applying the substance, keep children and pets away from it.
  
• Sprinkle it on the soil around potted plants, garden beds, or grass to destroy eggs and larvae.
• You can also put DE directly on plants. However, avoid placing it near flowers where pollinators might land.
  
• Further applications in the spring will kill off many of the emerging larvae. Puffing the powder onto the remaining adult pests will also kill them.

Alternatively, you can mix diatomaceous earth with water and spray it.

DIY diatomaceous earth spray recipes vary, but a general guide is to use four tablespoons for every gallon of water. Shake well and spray on plants and pests.

Where to Buy

You can buy garden diatomaceous earth (insect dust) online or at your local gardening center. However, always purchase food-grade diatomaceous earth for use in homes and gardens.

See also the success rate of diatomaceous earth against insects.

Takeaway

Diatomaceous earth is an age-old natural remedy against pests and bugs. It is most effective against pests that crawl over it. Start using it in your garden!

Image via creativecommons.org