You walk out and there are curls of bark all over the patio. Long strips under the sycamore. Sheets at the base of the oak. It looks like the tree is coming apart, and sometimes it is. But some of the healthiest trees in North Texas shed bark every year, and they look dramatic doing it.
Peeling bark has about six causes, and the response runs from do nothing to plan a removal. Species, spot, and what the wood underneath looks like tell you which one you have.
The trees that shed bark on purpose
Start with the good news. Sycamores are the loudest shedders in the area. All summer they push off plates of outer bark in a camo pattern of olive, tan, and cream, and the trunk underneath is smooth and pale. It is just growth: the trunk widens faster than the stiff outer bark can stretch, so the old layer cracks and drops. A healthy sycamore sheds every year and the canopy stays full.
Crape myrtles do the same thing smaller. In mid-summer the bark peels in thin, papery strips and the new surface is smooth and clean, sometimes pink or cinnamon. That smooth trunk is half the reason people plant them. Lacebark elms flake in small puzzle pieces of orange and gray, which is where the name comes from. Pecan bark furrows and loosens in long plates as the tree ages, and loose plates on an old pecan are usually just age.
The shared signs of a healthy shed: it happens in the growing season, the surface underneath is hard, clean, and lighter colored, the canopy is full, and the tree did it last year too. If all four are true, rake up the bark and move on.
Peeling that means the tree is in trouble
Now the other list. When an oak drops bark in sheets and the surface underneath is a dusty tan mat turning dark brown or black, that is usually hypoxylon canker. Oaks do not shed bark like sycamores. Hypoxylon only takes hold in a tree already stressed by drought, root damage, or construction, and bark popping off is a late sign.
Sunscald is the winter problem. A young, thin-barked tree in the open can have its southwest side cooked by low afternoon sun during a January cold snap. That side dies, splits, and peels while the north side stays fine. Redbuds and young maples are the usual victims, and the damage often shows up months later. Our guide to sunscald on young trees covers which species get hit, the wrap question, and how to tell a sunscald split from disease.
Other cankers make sunken, dead patches where bark flakes away and does not get replaced. Borers push bark loose from below; look for small holes and sawdust. Lightning can blow a spiral strip down a trunk in one storm. Bark gone at the base, with soft wood or mushrooms, points at root rot: a stability problem, not a cosmetic one. For what mushrooms around a trunk really mean, see our guide to mushrooms growing at the base of your tree. Our diagnosis guide runs the full checks for a sick tree.
The five-minute check
Species first. If your sycamore or crape myrtle is peeling in July with a full canopy, you are done. If your oak or cedar elm is peeling in a way it never has, keep looking. Location second: patches on the upper trunk with clean wood under them lean harmless. One long strip down the southwest side leans sunscald or lightning. Bark gone at the base is the one to take seriously, because the base is where the tree holds itself up.
Third, what is underneath. Fresh shed shows a hard, pale, smooth surface. Trouble shows black or dusty mats, soft wood, cracks, or sawdust and holes. Press a screwdriver gently against it. Hard is good. Sinking in is not.
Fourth, the canopy. Peeling bark under one dead section of crown means that section has been failing a while. Peeling under a full, green canopy on a known shedder means nothing. If the canopy is thinning fast, check the tree against the signs a tree needs to come out.
What to do, and what to leave alone
Do not pull at loose bark to help it along. Bark still attached at the edges covers living tissue, and tearing it widens the wound. A flap hanging by nothing can be trimmed clean at the tear. Digging under edges to see how far it goes cannot.
Do not paint, tar, or seal exposed wood. It does not heal the tree and can trap moisture against the surface. The Texas exception is oaks: a fresh oak wound from February through June gets pruning paint right away, as a barrier against the beetles that carry oak wilt.
What helps is boring. Water a stressed tree through dry spells with a slow soak at the drip line. Keep mulch wide and off the trunk. Take a dated photo of the peeling area every few months. A patch unchanged in a year is a scar. One that doubles is a decline.
Call somebody when the peeling is on an oak with dark mats under the bark, when bark is gone around more than half the trunk, when the base is soft, or when a thinning tree leans over a roof or driveway. Those are judgment calls, and they are what the tree risk check is for. A sycamore making a mess on your patio in August needs a rake, not a crew.
Common Questions
Is it normal for a crape myrtle to peel its bark?
Yes. Every summer, usually around July, crape myrtles shed old bark in thin strips, and what shows underneath is smooth, clean, and often a different color: pink, tan, cinnamon, sometimes almost white. It looks like skin, not a wound. The tree leafs and blooms fine, and does it again next year. Peeling with black patches, sunken dead areas, or dieback at the top is a different story.
The bark is falling off my oak in sheets and it is black underneath. What is that?
On a stressed oak, that pattern usually means hypoxylon canker. The fungus builds a cushion under the bark, pressure pops the bark off in patches or strips, and the surface underneath runs tan and dusty at first, then dark brown to black. No spray or treatment reverses it. The tree was already weakened, most often by drought, root damage, or construction. Keep what canopy is left watered through dry spells, and plan ahead if it stands over a roof or a driveway.
Should I paint or wrap a trunk where the bark came off?
Almost never. A clean shed or small wound closes faster on its own, and coatings trap moisture against the wood. The one Texas exception is a fresh cut or wound on an oak between February and June, painted right away as an oak wilt precaution. Wrapping is different: a loose paper trunk wrap over winter can protect a young, thin-barked tree from sunscald on its southwest side. On in late fall, off in spring, never left on into summer.
Can a tree survive losing a lot of bark?
Depends where and how much. Scattered patches with healthy canopy above them are usually fine. Trees wall off damaged sections and keep growing. What a tree cannot survive is losing the living bark all the way around the trunk, because that cuts the flow between roots and leaves above the ring. Half the circumference gone is serious. A full ring is fatal above that point. Bark gone at the base, with soft wood and a lean, is a worse combination than the same damage ten feet up.