Updated: April 7, 2023

Earwigs, also known as pincher bugs, are a common garden pest that can cause damage to plants and flowers. These insects are nocturnal and typically hide during the day, making them difficult to control. Many gardeners and homeowners are looking for ways to repel earwigs without using harmful chemicals.

Cypress mulch is a popular choice in landscaping and gardening due to its rich color and ability to retain moisture in soil. But can cypress mulch also repel earwigs?

Earwig Repellents

There are several methods used to repel earwigs, including diatomaceous earth, essential oils, and sticky traps. These methods can be effective, but also have limitations.

Cypress mulch is believed to repel earwigs due to its natural properties.

Cypress Mulch as an Earwig Repellent

Cypress mulch is made from the bark of cypress trees and has a natural oil that repels insects. This oil is believed to be effective at repelling earwigs, as well as other pests such as termites and ants.

Additionally, cypress mulch is acidic which creates an environment that is less favorable for earwigs to thrive in. Earwigs prefer alkaline soil, so the acidity of cypress mulch can help deter them.

Scientific research on the effectiveness of cypress mulch as an earwig repellent is limited. However, anecdotal evidence suggests that it can be effective when used properly.

Other Benefits of Cypress Mulch

In addition to its potential as an earwig repellent, cypress mulch has other benefits in landscaping and gardening. It helps retain moisture in soil, which can reduce water usage and promote healthy plant growth. Cypress mulch also breaks down slowly, which means it does not need to be replaced as often as other types of mulch.

Compared to other types of mulch, such as pine or cedar, cypress mulch has a richer color that can enhance the overall look of a garden or landscape.

Potential Drawbacks of Cypress Mulch

While cypress mulch has many benefits, there are also potential drawbacks to consider. Cypress trees are slow-growing and take many years to reach maturity. This means that the production of cypress mulch can contribute to deforestation if not done sustainably.

Additionally, some cypress mulch products may contain bark from other tree species or be mixed with other materials such as recycled pallets or construction waste. These products may not have the same insect-repelling properties as pure cypress mulch.


Cypress mulch has the potential to be an effective earwig repellent due to its natural properties. It also has many benefits in landscaping and gardening beyond insect control. However, it is important to consider the potential environmental impact of using cypress mulch and ensure that it is sourced sustainably.

If you are looking for a natural way to repel earwigs in your garden or landscape, cypress mulch may be worth considering.