You noticed a crack in your tree trunk and now you can’t stop looking at it. Maybe it showed up after the last storm. Maybe you just spotted it one morning and aren’t sure how long it’s been there. Either way you’re wondering if the tree is still safe or if you’ve got a problem on your hands that needs to be dealt with before it gets worse.
The honest answer is that it depends on the crack. Some are harmless. Some are serious. Here’s how to tell the difference.
Not All Cracks Are the Same
Trees develop different kinds of cracks for different reasons and they don’t all carry the same risk. The first thing to understand is that some cracking in tree bark is completely normal. As trees grow the outer bark doesn’t stretch the way the wood underneath does. It splits and furrows as the tree expands and those surface patterns are not a structural concern.
What you’re looking for is a crack that goes deeper than the bark. A crack that runs into the wood itself, that you can see has depth when you look at it straight on, is a different situation from surface bark texture.
Cracks That Show Up After a Storm
Spring Hill gets hit with serious storms and one of the most common calls we get at Spring Hill Tree Specialists after a storm comes through is from homeowners who noticed a crack in a tree trunk that wasn’t there before.
When a tree takes on heavy wind load the wood flexes. Most healthy trees handle that flex without any lasting damage. But trees that have any weakness in the wood, whether from age, disease or prior damage, can crack under that stress. The crack is the wood telling you it reached its limit.
A crack that appeared during or right after a storm is worth taking seriously. The tree absorbed more force than it could handle without damage and that crack is now a point of weakness that didn’t exist before. It doesn’t automatically mean the tree needs to come down but it does mean someone should look at it before the next storm comes through.
The Cracks That Matter Most
There are specific types of cracks that indicate a tree has moved from something to monitor into something to act on.
A crack that runs vertically along the trunk for any significant length is concerning. These sometimes develop when a tree freezes and thaws rapidly but in Spring Hill we see them more often as a result of lightning strikes or severe wind stress. A long vertical crack means the structural integrity of the trunk has been compromised along that line.
A crack at the base of a major limb where it connects to the trunk is one of the most serious things you can find on a tree. That junction is where the limb gets all of its support. When it cracks there the limb is no longer fully attached the way it should be. It’s being held by what’s left and what’s left is less than it was before the crack. Limbs in that condition can come down without much additional provocation. We’ve covered how to tell if a tree branch is actually dangerous if you’re dealing with a limb situation alongside the trunk crack.
A crack that has two sides that have visibly separated, where you can see a gap rather than just a line, means the wood has actually split apart. That’s not a surface issue. That’s structural failure that has already happened.
When Bark Separates From the Wood
Bark peeling or separating from the trunk in ways that don’t look like normal shedding is a separate concern from cracking but it often gets reported the same way. When bark separates and you can see the wood underneath, look at what that wood looks like.
Healthy wood underneath separated bark is typically light colored and firm. Wood that looks dark, soft and crumbling or has an unusual smell is wood that’s already decaying. Decay inside a trunk is not visible from the outside until it’s progressed significantly. Bark separation that reveals soft or discolored wood means there’s more going on inside than what you can see.
Homeowners in areas like Brookridge and Forest Oaks where we see a lot of older established trees often find this on trees that have been in the ground for decades. The outside of the trunk can look reasonably solid while the inside has been quietly breaking down for years.
What To Do If You Find a Crack
Don’t try to fill it, seal it or wrap it. Those approaches don’t fix structural damage and in some cases can trap moisture and make decay worse. The crack is there. What matters now is understanding what it means for the tree.
Get someone out to look at it in person. A crew that knows what they’re looking at can assess whether the crack is superficial or structural, whether the wood around it is sound or compromised and what the realistic risk is if the tree is left in place. If you want to understand what the inspection process looks like and what questions to ask, our tree service in Spring Hill page covers what we look at when we come out to assess a tree.
A legitimate crew will tell you honestly what they found. If the crack is not a structural concern they’ll tell you that and tell you what to watch for going forward. If the tree needs to come down they’ll explain why based on what they actually saw, not just because it’s a job.
We’ve also covered what happens when a tree looks completely fine but a company is still recommending removal if you’re getting a recommendation you’re not sure about and want to understand the reasoning before you make a decision.
The Bottom Line on Tree Trunk Cracks
A crack in a tree trunk is not automatically a reason to panic and it’s not automatically something to ignore. The type of crack, where it is on the tree, how deep it goes and what the wood looks like around it all factor into what it actually means.
If you’ve got a crack you’re not sure about, call us. We’ll come out, take a look and give you a straight answer on what you’re dealing with and what, if anything, needs to happen next. That’s all a free estimate is and it’s the fastest way to stop wondering and start knowing.