What Are These Weird Bumps on My Tree Leaves?
Every summer, homeowners across Omaha start noticing strange bumps, balls, spikes, or growths appearing on their tree leaves.
Naturally, the first question is: "What is wrong with my tree?"
In many cases, the answer is surprisingly simple: galls.
What Are Tree Galls?
Galls are abnormal growths that develop on leaves, stems, twigs, or branches. They form when insects, mites, fungi, bacteria, or other organisms interact with the tree's tissues. Think of them as the tree's version of a reaction or response.
Some galls resemble:
Small bumps
Round balls
Spikes
Pouches
Wart-like growths
They can vary greatly in size, shape, and color.
Are Tree Galls Harmful?
The good news is that most galls are primarily cosmetic. While they may look alarming, they typically do not cause significant harm to mature, healthy trees. Many trees continue growing normally despite the presence of galls.
Common Trees Affected in Omaha
We frequently see galls on:
Oak trees
Maple trees
Hackberry trees
Linden trees
Hackberry nipple galls are especially common throughout eastern Nebraska.
When Should I Be Concerned?
While most galls aren't serious, excessive gall activity can indicate stress or other underlying issues.
If you notice:
Significant leaf loss
Thinning canopy
Dead branches
Declining tree health
it may be worth having the tree inspected by a certified arborist.
Can Galls Be Treated?
Treatment depends on the type of gall and the severity of the issue. In many cases, treatment isn't necessary. However, proper tree care—including watering, fertilization, pruning, and routine inspections—can help trees better tolerate insect and environmental pressures.
Schedule a Tree Health Consultation
Not sure if you're dealing with galls, disease, or something else entirely?
American Arborist provides tree health assessments, treatments, pruning, and consultations throughout Omaha, Elkhorn, Bennington, Waterloo, Valley, Gretna, Papillion, La Vista, Ralston, Bellevue, Council Bluffs, Carter Lake, and surrounding communities.
Contact us today for a free consultation.