How to Stop Deer From Eating My Arborvitaes: Proven Strategies for Protection

To stop deer from eating your arborvitaes, you must combine physical barriers with consistent scent-based deterrents. These evergreens are a favorite winter snack for hungry deer, often leading to permanent damage or stunted growth if left unprotected. By layering these defense strategies, you can effectively safeguard your hedges and preserve your landscape’s lush appearance.

It is important to understand that no single solution is one hundred percent foolproof, especially when natural food sources become scarce during harsh winters. Deer are persistent creatures, so success relies on rotating your tactics to prevent them from becoming accustomed to a specific repellent. Realistic expectations will help you stay ahead of the herd.

This guide explains effective, humane methods to deter deer from your hedges and keep your landscape healthy throughout the year. We will walk you through installing protective fencing, applying reliable organic sprays, and selecting companion plants that naturally discourage browsing. Follow these practical steps to ensure your arborvitaes thrive without becoming a buffet for local wildlife.

Understanding Why Deer Target Arborvitaes

Arborvitaes are a staple in many landscapes, but they are also a preferred food source for deer, especially during the harsh winter months. As natural forage like grasses and leafy plants die back or become buried under snow, deer struggle to find adequate nutrition. Because arborvitaes remain green and accessible throughout the winter, they become a primary target for hungry herds.

Deer are opportunistic feeders. When they turn to your arborvitaes, they consume the tender foliage and twigs within their reach. This habit often leads to a visible “browse line,” where the lower portion of the tree is completely stripped of branches and needles, leaving only bare stems behind.

The damage caused by this repeated browsing is more than just an aesthetic issue. It significantly impacts the long-term health and structural integrity of the tree:

• Reduced Photosynthesis: By removing large amounts of foliage, deer limit the tree’s ability to produce energy, which stunts overall growth.
• Increased Vulnerability: Trees weakened by constant browsing are more susceptible to secondary stressors, such as drought, pests, and fungal diseases.
• Permanent Disfigurement: Arborvitaes do not easily regenerate growth from old wood. Once the lower branches are eaten away, they rarely grow back, leaving the tree permanently sparse at the base.
• Winter Stress: Losing foliage during the winter leaves the tree less protected against wind desiccation, which can lead to further browning and dieback.

Understanding this behavior is the first step in effective protection. Because deer view your arborvitaes as a necessary survival resource, they will persist until the tree is either protected by physical barriers or rendered unpalatable. Recognizing the early signs of browsing—such as jagged, torn branch ends rather than clean cuts—allows you to intervene before the damage becomes irreversible. By acting early in the season, you can prevent the development of a browse line and ensure your landscape remains full and healthy through the spring.

Physical Barriers and Fencing Solutions

Physical exclusion is the most reliable method for protecting your arborvitaes from hungry deer. Because deer are creatures of habit, once they discover your landscape as a food source, they will return repeatedly. A well-installed barrier is the only way to guarantee they cannot reach the foliage.

For individual trees, wrap each arborvitae in heavy-duty plastic deer netting or galvanized wire mesh. Ensure the barrier extends at least six to seven feet high, as deer can easily reach over shorter structures. If you are protecting an entire row, install a perimeter fence using high-tensile wire or specialized deer fencing anchored with sturdy metal T-posts.

Follow these steps for a secure and safe installation:

• Clear the area: Remove debris from the base of the trees to ensure stakes sit flush against the ground.
• Secure the mesh: Use zip ties or hog rings to attach the netting to your support posts. Ensure the bottom of the mesh is pinned to the ground with landscape staples so deer cannot push underneath.
• Maintain tension: Keep the fencing taut to prevent small animals from becoming entangled or deer from pushing the barrier inward.

Safety is paramount when working with fencing materials. When using wire cutters, always wear protective eyewear to prevent flying metal shards from causing injury. Ensure your cuts are clean; jagged wire ends are sharp and can easily slice through skin or clothing. If you are using wooden or metal stakes, ensure they are driven deep enough into the soil so they do not become hidden tripping hazards in the lawn.

If you choose to use plastic netting, inspect it seasonally. Sunlight can degrade synthetic materials over time, making them brittle. Replace any torn sections immediately to maintain the integrity of the barrier. By creating a physical deterrent, you remove the temptation entirely, allowing your arborvitaes to grow undisturbed throughout the winter months when natural food sources for deer are scarce.

Applying and Rotating Repellents

Deer are creatures of habit, but they are also highly adaptable. If you rely on a single repellent, deer will eventually realize the scent or taste no longer poses a threat. To maintain effective protection for your arborvitaes, you must rotate between different types of repellents every three to four weeks.

Repellents generally fall into two categories:

• Scent-based: These rely on odors deer find offensive, such as putrescent egg solids, garlic, or predator urine. These are best used when deer are just beginning to scout your yard.
• Taste-based: These contain bittering agents like capsaicin (hot pepper) or thiram. These discourage deer from continuing to feed once they take a test bite of your shrubs.

When you rotate products, switch between these two categories. For example, if you used a garlic-based spray for the first month, switch to a pepper-based formula for the second. This prevents the animals from becoming desensitized to the deterrents.

Regardless of whether you choose organic or synthetic options, safety is paramount. Many commercial repellents contain ingredients that can cause severe skin or eye irritation. Before you begin spraying, always prepare with the following personal protective equipment (PPE):

• Chemical-resistant gloves: Protects your skin from absorbing concentrated oils or chemical compounds.
• Safety goggles: Prevents accidental spray drift from entering your eyes.
• Long sleeves and pants: Minimizes skin exposure during application.

Always apply repellents on a calm, dry day to ensure the product adheres properly to the foliage. If you live in an area with high deer pressure, check your arborvitaes after heavy rainfall, as water will wash away most topical treatments. Reapply immediately after a storm to ensure the protective barrier remains intact. By staying consistent with your rotation and prioritizing your own safety during application, you can effectively train deer to bypass your landscape in favor of easier, less protected food sources elsewhere.

Landscaping and Natural Deterrents

Creating a defensive perimeter around your arborvitaes is one of the most effective ways to discourage deer from browsing. While no plant is 100 percent deer-proof—especially when natural food sources are scarce—deer rely heavily on their sense of smell to identify potential meals. By surrounding your vulnerable evergreens with plants that deer find offensive or difficult to navigate, you can make your garden a less attractive target.

Strategic companion planting works by masking the scent of the arborvitae or creating a physical barrier that deer prefer to avoid. Focus on incorporating strong-smelling herbs, fuzzy-textured foliage, or thorny shrubs. Deer typically dislike plants with pungent essential oils, which can overwhelm their sensitive noses and deter them from venturing closer to your prized trees.

Consider integrating these deer-resistant options into your landscaping beds:

• Strong-smelling herbs: Lavender, rosemary, sage, and thyme release intense aromas that mask the scent of nearby plants. These are excellent choices for the front of your garden beds.
• Thorny shrubs: Barberry, rugosa roses, or holly provide a physical deterrent. Their sharp thorns make it uncomfortable for deer to push through to reach the arborvitaes behind them.
• Aromatic perennials: Catmint, Russian sage, and peonies are generally ignored by deer due to their texture and scent profile.
• Ornamental grasses: Varieties like fountain grass or switchgrass create a rustling sound and texture that deer often find unappealing.

For the best results, layer these plants in a staggered pattern around the base of your arborvitaes. A dense, mixed border is more effective than a single row of one species. By diversifying your landscape with these resilient varieties, you create a sensory barrier that encourages deer to move on to easier, less protected grazing grounds elsewhere. Always ensure your chosen companion plants are suitable for your specific hardiness zone and light conditions to maintain a healthy, thriving garden ecosystem that serves both aesthetic and protective purposes.

Ongoing Maintenance and When to Seek Professional Advice

Once deer have browsed your arborvitae, your primary goal is to support the tree’s recovery. Inspect the damage carefully. If branches are snapped or stripped, use clean, sharp bypass pruners to make a clean cut just outside the branch collar—the swollen area where the branch meets the trunk. Never leave ragged stubs, as these create entry points for pests and disease.

For minor browsing, arborvitaes often recover with time and consistent hydration. However, if the damage is structural, such as significant bark stripping or the loss of the central leader, the tree may struggle to regain its natural shape. In these cases, it is time to contact a local certified arborist. Professionals can assess whether the tree has enough foliage to photosynthesize effectively or if it is suffering from irreversible stress.

Many homeowners look for “set-it-and-forget-it” technological solutions. Here is the reality regarding common deterrents:

• Motion-Activated Sprinklers: These are generally the most effective electronic deterrents. They startle deer with a sudden burst of water and noise, creating a negative association with your landscape. Ensure they are repositioned occasionally so deer do not become accustomed to the pattern.
• Ultrasonic Devices: There is little scientific evidence to support the effectiveness of ultrasonic sound emitters. Deer are highly adaptable and often ignore high-frequency noises once they realize the sound poses no physical threat.

Consistency is your best defense. If you rely on sprays or repellents, remember that they must be reapplied after heavy rain or during periods of rapid new growth. If you find yourself constantly battling deer despite your best efforts, consider installing a physical barrier, such as an eight-foot-tall woven wire fence. While an investment, it is the only method that provides near-total protection for your investment. If your arborvitaes are already severely stunted, replacing them with deer-resistant species—such as spruce or boxwood—may be a more sustainable long-term strategy for your garden’s health.