Sweetgum

Care & Maintenance

Sweetgum prefers moist, slightly acidic soil and does best in full sun. It's naturally a bottomland tree, so it tolerates wet conditions better than most, but it also handles average yard soil once established. You don't need to fertilize a healthy sweetgum in native soil — in alkaline soil, though, you may see yellowing leaves, which signals iron chlorosis that needs to be corrected with soil acidification, not just fertilizer.

Common Issues & Threats

• Gumball litter: The spiky seed balls drop from fall through spring and are a genuine hazard — painful to step on barefoot, hard to mow over, and impossible to ignore on a lawn or patio. There is no spray or treatment to stop them. The only real solutions are a sterile cultivar like 'Rotundiloba' if you're planting new, or learning to live with them on a mature tree.
• Fall webworm (Hyphantria cunea): Those silky white nests you see at the branch tips in late summer are fall webworm, and sweetgum is one of their favorite hosts. They look alarming but rarely kill a healthy tree. Prune out small nests early; on a large tree, most infestations are cosmetic and not worth chemical treatment.
• Surface root damage: Sweetgum roots are aggressive and will eventually lift sidewalks, crack driveways, and compete with nearby plantings. This is not a disease or pest — it's just the tree doing what sweetgum does. Planting one within 10 feet of hardscape is a decision you'll be paying for in 15 years.

Pruning Guide

Prune sweetgum in late winter while it's dormant, before new growth starts in spring. This tree bleeds sap heavily if cut during the growing season, which won't kill it but invites disease and pest pressure at the wound site. Focus on removing dead wood, crossing branches, and anything growing back toward the center of the canopy — sweetgum has a naturally strong central leader, so heavy structural pruning usually isn't necessary.

Did You Know?

Here's what most people get wrong: they think the gumballs are the fruit. They're actually a composite of many individual seed capsules fused together — each spike contains a seed. The tree was historically tapped for its resin, called storax or liquidambar, which was used in folk medicine and perfume. The genus name literally means 'liquid amber,' which gives you a sense of how valuable that resin once was.

Where Sweetgum Is Found

Sweetgum is common in 458 of the US communities we cover, across 1 climate regions.

... and 446 more cities