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Your dogwood tree leaves are curling because the tree is reacting to stress from pests, disease, or environmental conditions.
When dogwood leaves curl, it’s usually the tree’s way of protecting itself from losing too much moisture.
I know it can be alarming to see your beautiful dogwood suddenly look droopy, but the good news is most causes are treatable once you know what to look for.
In this post, we’ll dig into the most common reasons for dogwood tree leaf curling, how to identify each culprit, and simple steps you can take to help your tree bounce back.
Let’s get your dogwood looking healthy again.
Why Are My Dogwood Tree Leaves Curling?
The short answer is that dogwood tree leaves curl when the tree faces drought stress, pest attacks, or fungal infections.
Each cause leaves a different clue on the foliage, so you can usually tell which one you’re dealing with just by inspecting the leaves closely.
Let’s break down the three biggest reasons for curling dogwood leaves so you can match your tree’s symptoms to the right fix.
1. Drought Stress Makes Dogwood Leaves Curl Upward
When your dogwood tree leaves curl upward like tiny canoes, drought is often the first suspect.
Dogwoods have shallow root systems that dry out quickly during hot, windy, or prolonged dry spells.
The tree curls its leaves to reduce surface area and slow down water loss through transpiration.
This is your dogwood’s survival instinct kicking in, but it’s a sign that your tree is thirsty and struggling.
You’ll also notice the leaf edges might look crispy or brown if the drought has been going on for a while.
How to fix it: Give your dogwood a deep watering once or twice a week during dry periods, soaking the soil slowly to reach the roots.
Add a 2-4 inch layer of mulch around the base (but not touching the trunk) to lock in moisture.
If your dogwood leaves are curling from drought, they should uncurl within a few days after consistent watering.
2. Dogwood Borers Cause Leaves to Curl and Wilt
If you notice dogwood tree leaves curling along with wilting branches and tiny holes in the bark, you may have dogwood borers.
These are clearwing moths whose larvae burrow into the trunk and branches, disrupting the flow of water and nutrients.
When the tree can’t move water up to the leaves, the foliage starts to curl, yellow, and drop prematurely.
Borers often attack trees that are already stressed by drought, poor soil, or physical damage to the trunk.
How to spot them: Look for sawdust-like frass around the base, callused bumps, or cracked bark near entry holes.
How to fix it: Prune out and destroy heavily infested branches to reduce the borer population.
You can’t easily kill larvae inside the wood with sprays, so prevention is key.
Keep your dogwood healthy with proper watering and avoid wounding the trunk with lawn mowers or string trimmers.
If the infestation is severe, consider contacting a certified arborist for trunk injections or targeted treatments.
3. Fungal Diseases Like Anthracnose Make Dogwood Leaves Curl
Dogwood anthracnose is a fungal disease that thrives in cool, wet spring weather and causes dogwood tree leaves to curl, brown, and develop purple blotches.
This disease starts on the lower leaves first and works its way up, often killing the tree if left untreated.
Another fungal culprit is powdery mildew, which causes a white coating and curling on new dogwood leaves in humid conditions.
How to spot fungal issues: Look for irregular tan or brown spots with purple borders on the leaf surface.
Also check for twisted, distorted new growth, which is a classic sign of powdery mildew.
How to fix it: Rake up and remove fallen leaves to break the disease cycle.
Improve air circulation by pruning out overcrowded branches.
Apply a fungicide labeled for dogwoods in early spring before new growth appears, and repeat according to the label’s instructions.
For anthracnose, choose disease-resistant dogwood varieties like ‘Appalachian Spring’ if you’re planting new trees.
Other Less Common Reasons for Dogwood Leaf Curling
While pests, drought, and fungus cover most cases, a few other situations can also make dogwood tree leaves curl.
Let’s check those quickly so you don’t overlook something simple.
4. Insect Pests Like Aphids and Spider Mites
These tiny insects suck sap from the undersides of dogwood leaves, causing them to curl, pucker, and look distorted.
Aphids are usually easy to spot with the naked eye as small green or black bugs clustered on new growth.
Spider mites are even smaller and leave behind fine webbing on the leaves and stems.
How to fix it: Spray your dogwood with a strong stream of water to knock off aphids and mites.
For heavier infestations, apply insecticidal soap or neem oil, making sure to cover the undersides of the leaf curl areas.
Predatory insects like ladybugs and lacewings will also help control these pests naturally.
5. Herbicide Drift or Chemical Damage
If you recently sprayed weed killer on your lawn, even a tiny drift can cause dogwood leaves to curl and cup downward.
These chemicals disrupt the tree’s growth hormones, resulting in twisted, distorted foliage.
How to fix it: Unfortunately, there’s no cure for herbicide damage, but you can help your tree recover by keeping it well-watered and fed.
Avoid spraying herbicides on windy days and keep a safe distance from your dogwood next time.
New growth next season should come in normal once the chemical breaks down in the soil.
So, Why Are My Dogwood Tree Leaves Curling?
Your dogwood tree leaves are curling because of one (or more) of these three main triggers: drought stress, borer pests, or fungal disease.
The most common cause is drought, especially if you haven’t had soaking rain in a few weeks.
Start by checking the soil moisture and give your tree a deep drink if it’s dry.
Next, inspect the leaves and bark for signs of insects or fungal spots to rule out those issues.
If you address the root cause early, your dogwood’s leaves will likely uncurl and the tree will recover its graceful form.
With a little care and observation, you can keep those dogwood leaves flat, green, and gorgeous all season long.