What Kills Cypress Trees? (9 Things That Can Kill Them)

How to save a dying Leyland cypress tree

Even with their evergreen beauty and toughness to withstand harsh climatic conditions, cypress trees are also vulnerable to various factors that can cause their death. Understanding what kills cypress trees can help save these beautiful trees.

So, it’s essential to properly care for and regularly maintain your cypress trees to prevent them from dying. But first, you need to know some factors that can kill your cypress tree. This way, you will be able to take precautions. Let’s check them out!

What Kills Cypress Trees?

1. Cypress Canker

What kills cypress trees fast


Cypress trees can be affected by fungal diseases such as Cypress canker, which can lead to their death. Cypress canker is a result of a fungus called Seiriduim Cardinale. This fungal disease can affect various cypress tree species like Monterey and Leyland.

The main symptoms of cypress canker include sunken patches, cracking, resin bleeding, and dark patches. If the trunk gets infected by the cypress canker, it leads to the death of the whole tree.

2. Poor Drainage

If your soil is waterlogged, it can lead to the rot of the root system of your cypress tree, which is caused by fungal pathogens. These pathogens cause the root system to decay, making the root system stop absorbing water and nutrients, thus leading to the death of the plant.

3. Pests

Cypress trees can be affected by various pests, such as tip moths and cypress bark beetles, among others. These pests usually attach the foliage and the tree bark, thus weakening the plant. 

4. Harmful Chemicals

Cypress trees can also die when exposed to harmful chemicals like herbicides, pesticides, fungicides, and industrial pollutants. These chemicals affect the health of your cypress trees, which leads to their death.

5. Extreme Temperatures

What kills cypress trees naturally


Although cypress trees can withstand harsh climatic conditions like extreme temperatures, they also have their limits when it comes to temperature tolerance. Frost or low temperatures can damage the branches and foliage of your cypress tree, leading to their death.

6. Drought

Cypress trees can suffer from drought if they don’t receive enough water, leading to dehydration. This weakens the health of your plant, causing it to die. To prevent this, water your cypress tree adequately during drought or add mulching to retain soil moisture. 

7. Human Activities

Human-related activities like improper pruning, construction, and soil compaction can damage your cypress tree, leading to its death.

8. Bad Growing Conditions

Planting your cypress tree in bad conditions, like inadequate sunlight or poor soil drainage, can lead to its demise.

9. Old Age

Will roundup kill Leyland cypress


Just like living organisms, cypress trees also die from old age. As they age, they become more vulnerable to different diseases, which ultimately cause their death. 

Frequently Asked Questions

Why is my Cypress Tree Dying?

Many factors may contribute to the death of your cypress tree. For instance, drought, poor drainage, extreme temperatures, or harmful chemicals might cause your cypress tree to die. 

How Do You Restore a Cypress Tree?

If you plan to restore your cypress tree, you must prune it at the right time of the year. Prune any dead or damaged branches of your cypress tree. 

What Does a Dead Cypress Tree Look Like?

 A dead cypress tree has brown needles, and they usually fall off when the cypress tree is at its prime when the needles should be green.

Wrap Up

Proper management of diseases, pests, and other factors that can cause cypress trees to die can help maintain their health and longevity. More importantly, understanding how to address these issues can help preserve the evergreen beauty in your landscape.

So, look out for the above threats in your cypress trees to help save these elegant plants in your landscape.


Author Profile

🌿 Hello! I'm Mary, the nature-loving soul behind Serene Eden. Gardener, plant whisperer, compost connoisseur, sun-soaked plant enthusiast, and avid bee-watcher. Let's cultivate beauty, one bloom at a time. 🌱🌼