Lightning Hit Your Tree. How to Tell If It's Going to Make It

You come out after the storm and there's a strip of bark blown clean off the trunk, splinters of wood thrown thirty feet across the yard, and the tree standing there looking otherwise completely normal. Florida gets more lightning than any other state, so this is an ordinary call around here, and the honest answer to the ordinary question is that nobody can tell you in week one. What we can do is tell you what to watch, what the good signs and the bad signs look like, and how long you'll be watching.

What a Strike Does Inside the Tree

Electricity takes the wettest path available, and in a tree that's the thin layer of living tissue just under the bark where water and sugar move up and down. When the current runs through it, the moisture in that layer flashes to steam instantly. Steam takes up far more room than water, so it blows the bark off from the inside out. That's why you get a strip instead of a burn mark, and why the strip usually runs top to bottom and often spirals around the trunk, following the grain of the wood. Sometimes the current keeps going into the root zone and lifts soil or kills a rough patch of grass around the base. And sometimes there's nothing visible at all, because the charge traveled down wet outer bark without doing much, or ran inside without breaking out.

Why It Can Look Fine for Months

What a strike destroys is plumbing, not the tree's ability to look green today. A trunk with plenty of undamaged circumference left keeps moving water, and the leaves already on the tree are running on supply lines and stored energy that were built before the strike. So the canopy holds. Then demand goes up, either in the heat or through a dry stretch, and the damaged tree can't keep up with a full canopy on reduced plumbing. That's the delay almost everyone underestimates. A struck tree can carry a normal-looking canopy through an entire season and then thin out badly the following spring, which is exactly why 'it looks fine' in the first month is not the reassurance it feels like.

Reading the Damage in the First Week

Most of what matters is how much of the trunk's circumference lost its living layer. One narrow strip is the best case, since the rest of the plumbing is intact and the tree has a lot to work with. Multiple strips, or one wide blown-out section, is worse. Bark gone most of the way around means the tree is effectively girdled, and girdled is a schedule rather than a question. Beyond that, look at where the path went. A strip that runs down into the root flare or straight through a major union between two big stems is worse than the same damage on clean trunk, because those are the spots that carry load. Check whether the top is blown out or a leader is split. Then look at the trees nearby, because strikes sometimes reach more than one.

What Recovery Looks Like

Over the following year, a tree that's going to make it tells you so. The leaves it had hold through the rest of the season instead of dropping early. The next flush comes in full and normal-sized, not small or pale. No new dieback appears at the top of the canopy. And the best sign of all is visible from the ground: a raised ridge of wound wood starts rolling in from both edges of the exposed strip, slowly closing over the bare wood. That ridge is the tree walling the injury off and rebuilding around it. Bark edges that stay tight rather than lifting further are part of the same story. None of this happens in weeks. Give it seasons.

What Decline Looks Like

The other version has its own pattern. The canopy thins from the top down and from the outside in, which is the classic signature of a tree that can't push water all the way to the ends. Each flush comes in smaller and lighter in color than the last. Twig dieback keeps spreading instead of stopping. Bark keeps peeling well past the original strip. Sap, ooze, or dark staining runs down the trunk. A crop of small shoots breaks out along the trunk and the big limbs, which people often read as a comeback, and it isn't: that's the tree restarting from emergency buds because the top is failing. Mushrooms or hard shelf growths at the base show up last, and by then the decision is made.

What Moves In Afterward

The strike itself is only half of it. Exposed wood is an open door, and two things come through it. Decay fungi start working into the strike path and hollow the trunk from the inside, which is the dangerous part, because the outside can still look like a healthy tree long after the inside stopped being one. And wood-boring insects find stressed trees fast. Pines are the quick ones around here. A struck pine can attract bark beetles within weeks, and once they're established the tree goes down in a matter of months, not years. If you see fine sawdust in the bark crevices or small pitch blobs on the trunk of a pine that got hit, that's a call now, not a spring project.

Watch It, or Act Now

The target decides it, same as every other tree question. A struck tree over open lawn or a back fence line costs you nothing but attention, and plenty of them recover, so watch it for a year and take a photo of the strip from the same spot each season. The math changes over a bedroom, a driveway, a pool cage, or the street, because a trunk hollowing out along a strike path fails without much warning and doesn't ask which way you'd prefer it to go. Act now if the bark is off most of the way around, if the top is blown out, if the path runs through a major union with something valuable underneath, or if it's a pine with beetle signs. Our ISA Certified Arborist can put a real assessment on it, and if the call is removal it's usually a planned crew and crane job on a schedule you pick, not an emergency.

Frequently Asked Questions

Should I paint or seal the wound?

No. Wound dressings don't speed anything up and they can trap moisture against exposed wood, which helps decay rather than slowing it. Trees seal injuries from the inside by growing wound wood over them. Leave the wound open and let it work.

Should I pull off the loose bark?

Only bark that's already fully detached and hanging. Anything still attached along its edges is covering live tissue, and trimming back to a tidy line means cutting into good bark and making the injury bigger than lightning made it.

Should I fertilize it to help it recover?

Water beats fertilizer here. Pushing nitrogen at a tree with damaged plumbing asks it to grow foliage it can't supply. Deep, slow watering through dry stretches is the real help, plus a ring of mulch out over the root zone, kept off the trunk itself.

It got hit last year and still looks good. Am I in the clear?

Mostly, and a full year with a normal flush is a genuinely good sign. But the strike path stays a weak spot for the life of the tree, so keep watching the strip. Wound wood closing in from the sides means it's winning. Bark still lifting, or wood that's gone soft and punky in the middle of the scar, means it isn't.

Got a tree with a fresh stripe down the trunk and no idea what happens next? Text a photo to 941-445-3027 or book a free assessment. Adam will tell you whether it's a watch-it tree or one worth dealing with now.