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Your dogwood tree leaves are turning brown for a few very specific reasons, and the good news is that most of them are treatable.
If you’ve noticed your dogwood tree leaves turning brown, you’re probably feeling a little worried, and that’s completely understandable.
This is one of the most common questions we get from homeowners, and the answer usually comes down to water, weather, or disease.
In this post, we’ll break down the main culprits behind dogwood tree leaves turning brown, how to tell them apart, and exactly what you can do to bring your tree back to health.
Let’s dig in and help you figure out what’s going on with your dogwood.
Why Are My Dogwood Tree Leaves Turning Brown?
Dogwood tree leaves turning brown is almost always a sign of stress, and your tree is basically telling you something isn’t right in its environment.
The browning you’re seeing can be caused by a handful of different issues, from simple underwatering to serious fungal infections.
The key is to look closely at the pattern of the browning, because that will help you identify the real problem.
If the edges of the leaves are turning brown first, that’s a different issue than if you’re seeing brown spots in the middle of the leaf.
Let’s look at the most frequent reasons your dogwood tree leaves might be turning brown.
1. Drought Stress and Underwatering
The most common reason dogwood tree leaves turn brown is simple lack of water.
Dogwoods have shallow root systems, and they’re not very good at surviving long dry spells.
When the soil dries out, the leaves start to lose moisture faster than the roots can replace it.
This causes the leaf edges to dry out, curl, and turn brown, a classic sign of drought stress.
If you haven’t had rain for a week or two and your dogwood tree leaves are turning brown, underwatering is your prime suspect.
You can fix this by giving your tree a deep, slow watering about twice a week during hot, dry periods.
Just make sure the water penetrates down to the root zone, which is usually about 12 to 18 inches deep for a dogwood.
Pro tip: Add a 2–3 inch layer of mulch around the base of your tree to help lock in moisture.
2. Leaf Scorch from Heat and Wind
Another super common cause of dogwood tree leaves turning brown is leaf scorch, which happens during extreme heat or strong drying winds.
Leaf scorch isn’t a disease, it’s an environmental reaction.
When the air is hot and dry, water evaporates from the leaves faster than the roots can absorb it from the soil.
The result is that the leaf edges and tips turn brown and crispy, while the center of the leaf stays green.
This often happens on the side of the tree that faces the sun or the prevailing wind.
If you notice dogwood tree leaves turning brown in late summer after a heatwave, leaf scorch is likely the culprit.
Your tree should bounce back next spring, but you can help by providing afternoon shade if possible and keeping the soil consistently moist.
Extra help: Watering early in the morning reduces evaporation and gives your tree a full day to take up moisture.
3. Fungal Diseases Like Anthracnose
Dogwood tree leaves turning brown can also be a sign of a fungal disease called dogwood anthracnose.
This is a more serious issue, and it shows up with brown spots that have purple or dark borders.
Anthracnose thrives in cool, wet spring weather, and it spreads through splashing water from rain or overhead irrigation.
The spots start small, then they grow and merge, eventually causing large brown patches on your dogwood tree leaves.
If left untreated, anthracnose can cause leaf drop and even kill the tree over time.
To confirm anthracnose, look for browning that starts near the leaf veins and edges, and check for tiny tan or brown spots on the undersides.
If you suspect anthracnose, it’s best to rake up and dispose of fallen leaves, improve air circulation by pruning nearby branches, and consider a fungicide treatment in early spring.
4. Powdery Mildew and Other Fungal Issues
Another fungal cause of dogwood tree leaves turning brown is powdery mildew, which often appears as a white or gray coating on the leaves.
While the coating itself is white, infected leaves can turn brown and die off as the disease progresses.
Powdery mildew is more common in warm, dry weather with high humidity, and it loves shady spots with poor air flow.
If your dogwood tree leaves are turning brown and you also see that dusty white film, this is your problem.
You can manage powdery mildew by watering at the base of the tree rather than overhead, pruning for better airflow, and applying a fungicide if the infection is severe.
5. Root Damage or Poor Planting Depth
Sometimes dogwood tree leaves turning brown has nothing to do with the leaves themselves, but with what’s happening underground.
Dogwoods have sensitive, shallow roots, and they can easily suffer from root damage caused by construction, lawn mowers, or heavy foot traffic.
If the roots are damaged, the tree can’t take up enough water, and the leaves will turn brown just like they would from drought.
Another issue is planting depth, dogwoods should be planted so the root flare is slightly above the soil line.
If they’re too deep, the roots can suffocate, and dogwood tree leaves turning brown is a common result.
Check the base of your tree and make sure the trunk flares out before it enters the soil, and avoid digging or compacting the soil near the root zone.
How to Diagnose The Exact Cause
You don’t need to guess when dogwood tree leaves are turning brown, you can diagnose it by looking at the pattern of the browning.
If the browning starts at the leaf edges and tips, it’s usually water-related, either drought or leaf scorch.
If the browning shows up as irregular spots with dark borders, it’s likely a fungal disease like anthracnose.
If the entire leaf turns brown and falls off, but the tree otherwise looks healthy, it’s probably just natural stress shedding.
Also, consider the timing, dogwood tree leaves turning brown in early summer is more likely a water issue, while late-season browning could be disease or normal aging.
You should also check the soil moisture by sticking your finger a few inches into the ground near the tree.
If it’s bone dry, you have your answer, and if it’s soggy, that’s a whole different problem.
Prevention Tips To Keep Leaves Green
The best way to deal with dogwood tree leaves turning brown is to stop it from happening in the first place.
Water deeply and consistently, especially during the first few years after planting while the roots are establishing.
Apply a thick layer of organic mulch around the base, but keep it a few inches away from the trunk to prevent rot.
Avoid overhead watering in the evening, which leaves the foliage wet overnight and invites fungal diseases.
Prune your dogwood in late winter or early spring to improve air circulation and remove any dead or crowded branches.
Fertilize lightly in early spring with a balanced fertilizer, but don’t overdo it because too much nitrogen can stress the tree.
And finally, keep an eye on your tree throughout the growing season so you can catch problems before they spread.
So, Why Are My Dogwood Tree Leaves Turning Brown?
Dogwood tree leaves are turning brown because of stress, and the most common stressors are drought, heat, fungal disease, or root damage.
By identifying the specific pattern on your leaves, you can usually pinpoint the exact cause and take corrective action.
In most cases, adjusting your watering routine and improving airflow will solve the problem, but if you suspect a fungal disease, don’t hesitate to treat it early.
Your dogwood is a tough tree, and with a little care, it will bounce back and reward you with healthy green leaves again.
So take a walk outside, look at your tree closely, and give it the water or treatment it’s asking for.
Your dogwood will thank you.