If you live anywhere around Metro Atlanta, you know the drill. Every fall and winter, sweet gum tree balls show up by the hundreds in the yard, and they sit there until somebody picks them up. They hurt to step on barefoot and they roll into the driveway and under the deck. Homeowners in Cobb, Cherokee, and Gwinnett ask us about these trees constantly, so here is the plain version of what they are and what you can do about them.
What a sweet gum tree looks like
A sweet gum (Liquidambar styraciflua) is a native Georgia hardwood, and it grows fast in our red clay. Look for leaves shaped like a star, usually five points, about the size of your hand. In fall they turn yellow, then red, then a deep purple that is honestly the best thing about the tree. The bark is gray and deeply ridged. A mature one can hit 60 to 80 feet in an Atlanta yard.
If a tree in your yard drops hard, spiky balls about an inch across, it is almost certainly a sweet gum. People around here call them gumballs, sticker balls, or monkey balls. The usual mix-up is with a sycamore, which drops a softer, fuzzy ball instead.
What those spiky balls actually are
Sweet gum tree balls are the tree's fruit. Each ball is a cluster of seed capsules, and every little point is one capsule that cracks open and lets tiny seeds out. A healthy mature tree drops them by the thousand, mostly between late fall and early spring, with a few hanging on up in the crown into summer.
Here is the part people do not love. A sweet gum has to reach about 15 to 20 years old before it fruits, and then it fruits every year for the rest of its life. The crop size moves around from year to year, but it does not stop on its own.
Are sweet gum tree balls poisonous?
No. Sweet gum tree balls are not poisonous to people, dogs, or cats. The risk is physical, not chemical. They are hard and covered in points, so they turn a sloped driveway or a sidewalk into a slip hazard, and a dog that chews one can scratch up its mouth. Kids running around barefoot are usually the ones who complain loudest.
How to pick up sweet gum balls without wrecking your back
- Rolling nut gatherer. A wire basket roller is the one tool that genuinely works. You push it across the lawn and it scoops them up. A decent one runs about $30 to $70.
- Lawn sweeper. If you have a riding mower, a tow-behind sweeper clears a big yard in a fraction of the time.
- Blow them into a pile first. On a driveway or patio, a good blower will push gumballs into a windrow so you can shovel them into a can.
- Do not count on mulching them. They take years to break down and the mower just flings them. Some folks spread them in flower beds on purpose to keep cats and critters out, and that part does work.
- Pick your timing. Wait until the drop is mostly finished, usually late winter here, then do one or two big passes instead of ten small ones.
Can you stop a sweet gum from making balls?
Sort of, and you should go in with low expectations. There is a growth regulator (ethephon, sold under names like Snipper or Florel) that a licensed applicator puts on while the tree is flowering in spring. The timing window is narrow, maybe a week or two, and if you miss it the treatment does almost nothing. In a good year it cuts the number of sweet gum tree balls way down. In a bad year you are still out there raking.
It also has to be repeated every single year, and treatment usually runs somewhere around $75 to $250 per tree depending on size. Heavy pruning will not fix it either, because the tree fruits all through the crown. Good tree trimming and pruning is still worth doing for structure and clearance. Just do not expect it to solve a gumball problem.
When it makes sense to take the tree down
We are not going to tell you to cut down a healthy shade tree over yard debris. A big sweet gum throws real shade, and in a Georgia August that counts for a lot. There are cases where removal is the honest answer, though:
- The tree is already in decline, hollow, or leaning toward the house.
- Surface roots are lifting a driveway, walkway, or patio. Sweet gums are known for shallow roots in compacted clay.
- It sits close enough to the house that you are cleaning gutters and roof valleys over and over.
- Someone in the house has a fall risk and the balls on the front walk are a genuine hazard.
- You are redoing the lawn or putting in a pool or an addition anyway.
Around Metro Atlanta, taking down a mature sweet gum usually lands somewhere between $900 and $2,500. A very large one over a roof or near power lines can go higher, because the rigging takes longer and sometimes a crane makes more sense than climbing it. Smaller trees often come in at $400 to $800. Tree removal in Atlanta gets priced by size, access, and what is sitting underneath the tree, so it really does need an in-person look. After the tree is down, stump grinding typically adds $100 to $400 for a normal yard stump.
Is sweet gum any good as firewood?
It is okay, not great. Sweet gum burns fine once it is fully seasoned, but the grain twists, so splitting it by hand is miserable. Split it green with a hydraulic splitter if you can, and give it a full year to dry. For a cold January night, oak or hickory is the better wood.
Frequently Asked Questions
How deep are sweet gum tree roots?
Shallow and wide. Most of the root system sits in the top 12 to 18 inches of soil, and in our hard red clay it spreads sideways instead of digging down. That is why these trees push up so many surface roots and lift so much concrete.
How far from the house should a sweet gum be planted?
At least 30 to 40 feet from the foundation, and farther if your lot allows it. They get big, the roots run shallow, and the fruit drop is heavy. If you are choosing a new yard tree, our guide to the best trees to plant in Georgia covers options that behave better on a tight lot.
Are there seedless sweet gum trees?
Yes. A few fruitless cultivars exist, and Rotundiloba is the common one. It has rounded leaf lobes and does not set the balls. You cannot convert an existing tree into one, so that only helps if you are planting something new.
Do sweet gum balls kill grass?
Not directly. A thick mat of them will smother turf over a winter, though, and they keep you from mowing cleanly in spring. Clear them out before green-up and the lawn usually bounces back.
Get a straight answer about your sweet gum
Every yard is a little different. Sometimes the fix is a growth regulator and a good nut gatherer. Sometimes the tree is already failing and the gumballs are the smallest part of the problem. We will come take a look, tell you what we would do if it were our own yard, and give you a real number.
Stanton Tree Service is licensed, insured, and family run, working across Cobb, Fulton, Cherokee, Gwinnett, and Forsyth. Call (470) 914-3402 for a free estimate.