Why Is My Arborvitae Turning Brown? (How To Treat Browning)

Arborvitae turning brown due to various factors such as insufficient water, exposure to drying winds, high temperatures, an immature root system, root damage, and sometimes, infestations of spider mites. These conditions cause the foliage to dry out, resulting in the brown coloration.

Here’s a more detailed explanation of why arborvitae foliage turns brown:

1. Lack of Water: Lack of water is one of the main causes of arborvitae browning. There may not be as much moisture available in the winter due to the combination of freezing temperatures and the sun’s and wind’s drying effects. The foliage starts to dry up and turn brown when there is insufficient water flow. Arborvitae and other evergreens need water to be healthy.
2. Drying Winds: Arborvitae leaves and needles lose moisture more quickly in the presence of strong, drying winds, which might make the situation worse. Extended exposure to windy circumstances may cause stress to the foliage, which can ultimately cause it to turn brown.
3. High Temperatures: High temperatures, particularly in the summer, may cause arborvitae to become brown. Heat stress and a lack of water may cause foliage to wither and change color.
4. Immature Root System: Arborvitae that are young or recently planted may have an immature root system that finds it difficult to provide the plant with enough water. This may increase their vulnerability to browning, particularly in dry spells.
5. Root Damage: Any harm to the roots, whether from disease or mechanical damage during planting, might interfere with the plant’s capacity to take up water and nutrients. Foliage browning may result from this root injury.
6. Spider Mite Infestations: Spider mite infestations may sometimes cause arborvitae to turn brown. These microscopic pests harm the foliage and run the risk of turning it brown by puncturing the leaves and sucking off plant juices.
7. The seasonal drop of needles is a noteworthy feature of evergreens, such as arborvitae, which naturally release their older needles as new growth appears. A typical part of the plant’s life cycle, this might lead to the inner leaf browning.
8. Severe Environmental circumstances: Arborvitae may become stressed and exhibit browning if exposed to severe environmental circumstances, such as strong winds and very low temperatures. Not only may high temperatures lead to issues, but strong winds can also have a comparable impact.
9. Newly transplanted arborvitae may suffer from transplant shock, which results in browning and yellowing of the needles along the trunk. Inadequate watering may make this worse and is more frequent in the autumn.

Factors Causing Browning In Arborvitae

Factors Causing Browning in Arborvitae Arborvitae, with its vibrant green foliage, can add beauty and elegance to any landscape. However, sometimes you may notice your arborvitae turning brown, which can be alarming. Understanding the factors that can cause this browning can help you effectively treat and restore the health of your arborvitae. In this blog post, we will delve into the various factors that contribute to arborvitae browning, including lack of water, overwatering, poor soil conditions, insufficient nutrients, and disease and pest infestation.

Lack of Water

One common reason for arborvitae browning is a lack of water. Arborvitae plants require adequate moisture to thrive. When they don’t receive enough water, their foliage may start turning brown and dry. It’s important to regularly check the moisture level of the soil surrounding your arborvitae and ensure it stays consistently moist. If you live in an area with low rainfall or experience a drought season, it’s crucial to supplement watering to prevent your arborvitae from becoming dehydrated and browning.

Overwatering

While the lack of water can cause browning, overwatering can also be detrimental to arborvitae. When the roots of arborvitae plants are constantly submerged in waterlogged soil, they can suffocate and rot. Excessive moisture in the soil prevents proper oxygen circulation to the roots, leading to brown and dying foliage. Ensure that you provide your arborvitae with well-draining soil to prevent water accumulation and only water when the top few inches of the soil are dry to the touch.

Poor Soil Conditions

The quality of the soil in which your arborvitae is planted plays a significant role in its overall health. Poor soil conditions, such as compacted or nutrient-deficient soil, can cause the foliage to turn brown. Compacted soil restricts root growth and prevents them from accessing essential nutrients and moisture. Additionally, if the soil lacks the necessary nutrients, your arborvitae may not receive the nourishment it needs, leading to browning. To improve soil conditions, consider adding organic matter, such as compost or well-rotted manure, and regularly fertilize your arborvitae to ensure it receives the vital nutrients it requires.

Insufficient Nutrients

Like any other plant, arborvitae needs a balanced supply of nutrients to remain healthy and vibrant. Insufficient nutrients can cause the foliage to turn brown and weaken the overall structure of the tree. The lack of essential nutrients, including nitrogen, phosphorus, and potassium, can hinder the growth and development of your arborvitae. Regularly fertilizing your arborvitae with a suitable slow-release or balanced fertilizer can replenish the nutrient levels in the soil and help prevent browning.

Disease and Pest Infestation

Lastly, arborvitae browning can be a result of disease or pest infestation. Various diseases, such as needle blights or root rot, can affect the health of your arborvitae, causing browning and eventual dieback. Additionally, pests like aphids, spider mites, or bagworms can feed on the foliage, leading to brown patches. It’s important to regularly inspect your arborvitae for any signs of diseases or pests and take prompt action to control and treat the issue. Using appropriate fungicides or insecticides can help eliminate the pests and prevent further browning. In conclusion, understanding the factors causing browning in arborvitae is crucial in maintaining the health and appearance of these plants. Whether it’s addressing a lack of water, avoiding overwatering, improving soil conditions, providing sufficient nutrients, or combating diseases and pests, taking the necessary steps to treat and prevent browning can help your arborvitae thrive with lush green foliage. So, keep an eye out for these factors and ensure the proper care of your arborvitae to enjoy its beauty for years to come.

Also Read : Emerald Green Arborvitae Growth Rate: How Fast Does it Grow?

Identifying The Symptoms Of Browning Arborvitae

Browning of arborvitae can be a cause for concern for any homeowner or gardener. The lush and green foliage of these majestic evergreen trees can suddenly turn brown, leaving you puzzled and wondering what might be the cause. However, understanding the symptoms of browning arborvitae can help you identify the problem and take appropriate measures to treat it. In this article, we will discuss the various symptoms to look out for and how to address them.

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Browning of Foliage

One of the most obvious symptoms of browning arborvitae is the discoloration of foliage. Instead of the vibrant green color you are used to seeing on these trees, the foliage might turn brown. This browning can occur in patches or affect the entire tree. If you notice the foliage losing its green hue and turning brown, it is a clear indication that something is wrong.

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Yellowing Leaves

In addition to browning, another symptom to watch out for is the yellowing of leaves. The leaves of your arborvitae may turn yellow before eventually browning. This yellowing can start at the tips of the branches and gradually spread throughout the tree. If you observe the leaves losing their green color and becoming yellow, it is a sign of distress in the arborvitae.

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Dry or Brittle Foliage

Another indication that your arborvitae may be suffering from browning is the dry or brittle foliage. Healthy arborvitae trees have soft and supple foliage, but when the tree is under stress, the needles or leaves can become dry and brittle. You may notice the foliage losing its moisture and turning dry to the touch. This can be a result of several factors, including drought, disease, or pest infestation.

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Black or Brown Spots

Inspecting the foliage of your arborvitae closely may reveal the presence of black or brown spots. These spots can be an alarming sign, indicating the presence of fungal or bacterial infection. If you notice any dark spots on the foliage, it is essential to take immediate action to prevent the spread of the infection and protect the overall health of the tree. Early detection and treatment can significantly increase the chances of recovery for your arborvitae.

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Wilting or Drooping Branches

Wilting or drooping branches are another symptom that your arborvitae may be suffering from browning. These trees typically have a healthy and upright growth pattern, but when they are experiencing stress or damage, the branches may start to droop or wilt. This can occur due to various reasons, such as root rot, nutrient deficiencies, or improper watering. It is crucial to address these issues promptly to prevent further damage to your arborvitae.

1. Assessing Watering Needs

One common issue that arborvitae owners may face is browning of their plants. This can be a cause for concern, as healthy arborvitae should have vibrant green foliage. One of the key factors that contribute to browning is improper watering. Understanding the watering needs of your arborvitae and implementing the right watering techniques can help you prevent and treat browning effectively.

Checking Soil Moisture Levels

A crucial step in assessing your arborvitae’s watering needs is checking the moisture levels of the soil. Too much or too little water can both lead to browning. To check the soil moisture, gently dig a small hole near the base of the tree and reach about 3 to 4 inches deep. With your fingers, feel the soil at that depth to determine its moisture content.

If the soil feels dry, it indicates that your arborvitae is not receiving enough water. On the other hand, if the soil feels overly wet, it suggests that the tree is receiving too much water. Ideally, the soil should be moist but not waterlogged, providing adequate drainage for the roots.

Proper Watering Techniques

Once you have assessed the moisture levels of your arborvitae’s soil, it is important to implement proper watering techniques to maintain its health. When watering your arborvitae, ensure that the water is reaching the root zone, which is typically within the top 12 inches of soil. This is where the majority of the roots are located and where they extract water from.

To water your arborvitae effectively, use a garden hose or a drip irrigation system. Position the hose or the drip emitter near the base of the tree, allowing the water to slowly penetrate the soil. This helps in deep root saturation, promoting healthier growth and reducing the chances of browning.

Implementing an Irrigation Schedule

Creating and following an irrigation schedule can significantly contribute to the overall health of your arborvitae. By providing a consistent and appropriate amount of water, you can help prevent browning and keep your tree looking lush and vibrant. The frequency of watering depends on various factors such as the climate, soil type, and age of the tree.

As a general guideline, newly planted arborvitae require more frequent watering, especially during hot and dry periods. Generally, watering your arborvitae once or twice a week during the growing season should be sufficient. However, it’s essential to adjust the frequency based on environmental conditions and the specific needs of your tree.

Remember, overwatering can be just as detrimental to your arborvitae as underwatering. Be observant of the moisture levels and adjust your watering schedule accordingly.

In conclusion, assessing and meeting the watering needs of your arborvitae is crucial in preventing and treating browning. By regularly checking soil moisture levels, employing proper watering techniques, and implementing an irrigation schedule, you can help your arborvitae thrive and maintain its vibrant green color.

2. Improving Soil Conditions

When it comes to maintaining the health and appearance of your arborvitae, one of the key factors to consider is the condition of the soil it’s planted in. If you’ve noticed that your arborvitae is turning brown, it may be a sign that the soil conditions are not ideal for its growth. Fortunately, there are several steps you can take to improve the soil conditions and help your arborvitae thrive once again.

Soil Testing and Analysis

The first step in improving soil conditions for your arborvitae is to conduct a soil test and analysis. This will give you valuable insights into the pH level of your soil, as well as its nutrient content and composition. You can easily find soil testing kits online or consult a local gardening center for professional soil testing services.

Based on the results of the soil test, you can determine the specific amendments needed to restore the health of your arborvitae. Whether it’s correcting the pH level or addressing nutrient deficiencies, a soil test can guide you in making informed decisions about improving the soil conditions.

Enhancing Drainage

One common reason for arborvitae browning is poor drainage. If the soil around your arborvitae retains water for extended periods, it can lead to root rot and other moisture-related issues. Enhancing drainage is crucial in preventing or treating browning.

To improve drainage, you can follow these steps:

1. Identify areas where water tends to accumulate around your arborvitae.
2. Create a drainage system by grading the soil away from your arborvitae or installing drainage tiles or pipes.
3. Ensure that the soil is not compacted, as compacted soil can impede water flow.

By enhancing drainage, you can minimize excess moisture around your arborvitae and reduce the risk of browning.

Adding Organic Matter or Amendments

Another effective way to improve soil conditions for your arborvitae is by adding organic matter or amendments. Organic matter, such as compost, can enhance soil structure and provide essential nutrients. Amendments, such as lime or sulfur, can be used to adjust the pH level of the soil.

Here are some steps to follow when adding organic matter or amendments:

1. Spread a layer of organic matter, such as compost or well-rotted manure, around the base of your arborvitae.
2. Use a garden fork or rake to gently incorporate the organic matter into the top few inches of soil.
3. If needed, apply the recommended amendments based on the soil test results.

Adding organic matter or amendments can help improve soil fertility, structure, and overall health, promoting healthy growth in your arborvitae.

In conclusion, by focusing on improving soil conditions, you can address the issue of browning arborvitae. Performing a soil test and analysis, enhancing drainage, and adding organic matter or amendments are effective ways to create a favorable environment for your arborvitae to flourish. Taking these steps will not only revive the health and beauty of your arborvitae but also contribute to the overall aesthetic appeal of your garden.

3. Providing Proper Nutrients

One possible reason why your arborvitae is turning brown could be due to a nutrient deficiency. Just like any living organism, plants need a balanced diet to thrive and stay healthy. In this section, we will discuss how to identify nutrient deficiencies in your arborvitae, the importance of fertilizing, and choosing the right fertilizer and application method.

Identifying Nutrient Deficiencies

To treat browning in your arborvitae, it is essential first to identify the specific nutrient deficiency affecting your plant. This will help you determine the appropriate course of action to rectify the problem. Here are some common signs of nutrient deficiencies in arborvitae:

• Yellowing or browning of the leaves
• Stunted growth
• Poor overall health
• Leaf discoloration or spots

If you notice any of these symptoms, it is important to take prompt action to provide your arborvitae with the necessary nutrients it requires.

Fertilizing Arborvitae

Fertilizing your arborvitae is an effective way to ensure it receives the essential nutrients it needs. Fertilizers provide a concentrated source of nutrients that may be lacking in the soil. However, it is crucial to fertilize your arborvitae properly to avoid over-fertilization, which can be just as damaging as nutrient deficiencies.

When fertilizing your arborvitae, consider the following factors:

1. Timing: Fertilize your arborvitae during the active growing season to maximize nutrient uptake.
2. Frequency: Follow the recommended fertilization schedule for arborvitae, usually once or twice a year.
3. Amount: Avoid excessive application of fertilizer, as this can lead to burnt roots and other issues.
4. Watering: Always water your arborvitae thoroughly after fertilization to help the nutrients reach the roots.

Choosing the Right Fertilizer and Application Method

Not all fertilizers are created equal, and choosing the right one for your arborvitae is essential. Different plants have specific nutrient requirements, and using the wrong fertilizer may not address the deficiencies effectively. Here are some key considerations when selecting a fertilizer:

Fertilizer Type	Nutrient Content	Application Method
Granular	Slow-release	Spread evenly around the base of the arborvitae
Liquid	Quick-release	Applied directly to the foliage or soil
Organic	Natural and slow-release	Spread evenly around the base of the arborvitae

Consider performing a soil test or consulting with a professional to determine the specific nutrient deficiencies in your arborvitae. This will help you choose the appropriate fertilizer type, nutrient content, and application method for the best results.

By providing your arborvitae with the proper nutrients through fertilization, you can address nutrient deficiencies and promote healthy growth, reducing the risk of browning in your plants.

4. Addressing Diseases And Pests

Arborvitaes are generally hardy and easy to care for, but they can still be susceptible to various diseases and pests. If you’ve noticed your arborvitae turning brown, it’s important to take action promptly to prevent further damage and keep your plants healthy. In this section, we will help you identify common arborvitae diseases and offer recommended disease control measures. We will also discuss how to identify and control arborvitae pests.

Identifying Common Arborvitae Diseases

There are several diseases that can cause arborvitae foliage to turn brown. Identifying these diseases early on is crucial for effective treatment. Here are some of the most commonly observed arborvitae diseases:

1. Marssonina Blight (Diplodia Tip Blight): This fungal disease is characterized by brown tips and branches, as well as small, black fruiting bodies on infected areas.
2. Cedar Apple Rust: This disease causes rusty-colored spots on the foliage, along with galls on the branches.
3. Phytophthora Root Rot: This soil-borne disease affects the roots, leading to stunted growth, wilting, and eventually browning of the arborvitae.

Recommended Disease Control Measures

Once you’ve identified the specific disease affecting your arborvitae, it’s important to take the necessary steps to control and treat it. Here are some recommended disease control measures:

1. Remove and destroy infected plant material: Prune the affected branches, making sure to disinfect your pruning tools between cuts. Dispose of the infected material properly to prevent the disease from spreading.
2. Improve air circulation: Trim back nearby plants and ensure adequate spacing between arborvitaes to promote good airflow, which can help reduce disease incidence.
3. Apply appropriate fungicides: Consult with a local gardening expert or horticulturist to determine the most suitable fungicide for treating the specific disease affecting your arborvitae. Follow the instructions carefully for effective control.

Identifying and Controlling Arborvitae Pests

In addition to diseases, arborvitaes can also fall victim to various pests. Identifying these pests early on is crucial for effective pest control. Here are some common arborvitae pests to watch out for:

Bagworms

– These caterpillars create distinctive bag-like structures, made of twigs and foliage, on the arborvitae branches.

Spider Mites

– These tiny pests can cause arborvitae foliage to take on a bronzed appearance. You may also notice fine webbing on the branches.

Scale insects

– Scale insects can be found on the branches of arborvitaes, appearing as small bumps or scales. They can cause discoloration and stunted growth.

Once you’ve identified the specific pests affecting your arborvitae, it’s important to take the necessary steps to control and treat them. Here are some recommended pest control measures:

• Manual removal: For pests like bagworms, manually removing the bags from the branches is an effective control method. Dispose of the bags to prevent reinfestation.
• Introduce beneficial insects: For certain pests, such as spider mites and scale insects, introducing beneficial insects like ladybugs or using insecticidal soaps can help control their population.
• Apply appropriate insecticides: If the infestation is severe, consulting with a local gardening expert or arborist is recommended to determine the most effective insecticide for your specific pest problem.

By being proactive in addressing diseases and pests affecting your arborvitae, you can help ensure their health and vitality. Regular monitoring, prompt identification, and appropriate treatment are key to maintaining beautiful, thriving arborvitaes in your landscape.

Regular Inspections And Pruning

Regular inspections and pruning play a crucial role in maintaining the health and appearance of your arborvitae. By conducting regular inspections and pruning, you can effectively treat the browning of your arborvitae and promote its overall well-being. In this section, we will explore two important aspects of regular inspections and pruning: trimming dead or diseased branches and promoting air circulation.

Trimming Dead or Diseased Branches

One of the first steps in treating the browning of your arborvitae is to trim any dead or diseased branches. These branches not only detract from the aesthetics of your plant but can also serve as entry points for pests and diseases. To identify dead or diseased branches, carefully inspect your arborvitae’s foliage and look for any discoloration, wilting, or complete lack of foliage. Additionally, feel the branches with your fingertips to check for brittleness or absence of elasticity, indicating that the branch is dead or diseased.

Once you have identified the dead or diseased branches, it’s time to trim them. Use a pair of pruning shears or loppers that are clean and sharp to make clean cuts. Start by cutting the branch at a slight angle, just outside the collar, which is the swollen area where the branch meets the trunk. Avoid cutting too close to the trunk as it can damage the healthy tissue and lead to further issues. Dispose of the trimmed branches properly to prevent the spread of diseases.

Promoting Air Circulation

Poor air circulation is another common reason for arborvitae browning. When the foliage of your arborvitae becomes dense and crowded, it restricts air movement within the plant, creating a favorable environment for diseases to thrive. To promote air circulation and prevent browning, it is essential to maintain proper spacing between your arborvitaes and other surrounding plants.

Start by assessing the spacing between your arborvitaes. If they are planted too closely together, it may be necessary to selectively remove some plants to ensure adequate airflow. Trim the branches on the outer edges of the arborvitae to create gaps between them, allowing air to flow freely and prevent moisture buildup. This can aid in preventing the development and spread of diseases that can cause browning.

In addition to proper spacing, consider pruning the interior branches of your arborvitae to further improve air circulation. Remove any branches that are crossing or rubbing against each other, as they can promote moisture retention and hinder air movement. This practice will help create a more open and breathable canopy, reducing the likelihood of browning.

By implementing regular inspections and pruning, you can effectively address the browning of your arborvitae. Trimming dead or diseased branches and promoting air circulation are essential steps towards maintaining the health and vibrancy of your plants. Remember to conduct these tasks regularly to catch any issues early on and ensure the longevity of your arborvitae.

Implementing Good Cultural Practices

If your arborvitae is turning brown, it may be a sign that the plant is not receiving the proper care it needs. Implementing good cultural practices can help prevent browning and promote the overall health of your arborvitae. By following these essential guidelines, you can ensure your arborvitae remains vibrant and green.

Mulching

One effective practice to protect your arborvitae from browning is mulching. Apply a layer of organic mulch around the base of the plant, ensuring it does not directly touch the trunk. Mulching helps to conserve moisture, regulate soil temperature, and suppress the growth of weeds that can compete with your arborvitae for essential nutrients. Organic mulch, such as wood chips or shredded bark, not only provides these benefits but also enhances the appearance of your garden.

Proper Plant Spacing

Proper spacing between arborvitae plants is crucial for their overall health and to prevent browning. Without adequate space, the plants can become overcrowded, which restricts air circulation and leads to moisture buildup. Lack of air circulation and excess moisture provide an ideal environment for fungal diseases to thrive, resulting in browning and other adverse effects. Ensure sufficient space by following the recommended spacing guidelines for your specific arborvitae species. This will allow the plants to grow and flourish, reducing the risk of browning.

Regular Monitoring and Maintenance

Regular monitoring and maintenance are essential to identify and address issues that may lead to browning in your arborvitae. Schedule routine inspections to check for signs of pests, diseases, or nutrient deficiencies. Regularly examine the needles, branches, and overall appearance of the plant. Look out for discoloration, wilting, or any unusual changes. Address any problems promptly to prevent them from escalating and causing browning. Alongside monitoring, it is crucial to adhere to regular maintenance tasks such as proper watering, fertilization, and pruning to promote the health and vitality of your arborvitae.

Implementing good cultural practices like mulching, proper plant spacing, and regular monitoring and maintenance is vital to prevent browning in your arborvitae. Following these guidelines ensures that your arborvitae remains green, healthy, and a beautiful addition to your garden.

Protecting Arborvitae From Extreme Weather

Frequently Asked Questions

Why Is My Arborvitae Turning Brown?

Arborvitae turning brown is usually caused by environmental stressors such as drought, winter damage, or improper planting. It can also be caused by certain diseases or pests. Proper watering, mulching, and pruning can help treat browning.

Conclusion

It’s disheartening to see your arborvitae turning brown, but the good news is that there are ways to treat this issue. By addressing potential causes such as improper watering, pests, or disease, you can restore your arborvitae’s lush, green appearance.

Regularly monitoring your plant’s health and taking appropriate action will help in maintaining its vitality. Remember to consult with a professional if needed to ensure the best care for your arborvitae. Happy gardening!