Trees are a Texas survival tool. They cool homes, cut air-conditioning load, and make summer livable. But unmanaged vegetation near power lines is also one of the top causes of power outages and a serious safety risk.

Oncor owns and operates the poles and wires that deliver electricity to millions of Texans. Their vegetation management program is the grid’s quiet bodyguard. It keeps overhead electric lines clear of trees, vines, and other vegetation so power stays on and restoration is faster after storms.

This guide explains Oncor tree trimming, why vegetation management matters, and what Texans should do to avoid outages.

Why vegetation management matters for Texas reliability

Texas weather is a contact sport. Wind, lightning, heat, and ice can push tree limbs into energized lines in seconds. When trees touch power lines, they can conduct electricity, cause sparks or fires, and trigger neighborhood-wide outages.

Oncor uses proactive vegetation management to reduce these risks before storms arrive. Routine line-clearance tree trimming means:

• fewer tree-caused power outages
• safer conditions for the public and utility crews
• faster restoration because lines are accessible when damage happens

Trim now. Don’t blackout later.

Who trims trees near power lines in Texas?

For overhead distribution and transmission lines, Oncor is responsible for tree trimming that keeps required safety clearance around their energized equipment.

For the service drop (the wire from the pole to your home or business), the property owner is responsible for keeping trees clear. If work needs to happen near that service wire, you must contact Oncor first so they can disconnect service temporarily.

High-intent takeaway:
If it is pole-to-pole or near main power lines, Oncor trims it.
If it is your pole-to-house service wire, you manage it safely with Oncor’s help.

What Oncor tree trimming crews do (and do not do)

Oncor line-clearance arborists and qualified tree professionals prune only where vegetation could impact electric reliability.

They may trim:

• around high-voltage lines at the top of utility poles
• near lower-voltage lines below transformers if needed for clearance

They do not trim:

• around cable television or phone lines (different infrastructure)

Oncor removes debris from planned pruning work. After major storms, debris pickup can lag because power restoration is priority one.

Never DIY tree trimming near power lines

Oncor’s rule is blunt: do not go within 10 feet of overhead energized lines. Do not trim it yourself. Do not hire an unqualified landscaping crew.

Tree limbs near power lines can energize unexpectedly. Even “not touching” can still arc. Utilities use trained, line-qualified crews with insulated equipment because the risk is lethal.

Power Move: If a branch is close enough to make you wonder, it is close enough to call Oncor.

Plant Smart: prevent future Oncor trimming and power outages

Vegetation management is the fix. Smart planting is the prevention. Oncor’s “Know Before You Grow” guidance helps Texans choose trees and locations that will not create long-term hazards.

1. Make a simple planting plan

Before digging, map:

• overhead power lines
• sidewalks, curbs, driveways
• foundations and patios
• underground utilities

This avoids future removals, concrete damage, and clearance problems.

2. Match tree height to the right zone

Tree mature height determines placement.

• Small trees (≈20 feet or less at maturity): safest near distribution areas, but still not directly under lines.
• Medium trees (≈40 feet): place where they have room to spread without reaching lines.
• Large trees (≈60 feet or more): plant far from overhead lines and away from transmission rights-of-way.

Plant a tall tree under lines and you are signing up for a permanent trimming cycle and higher outage risk.

3. Pick Texas-appropriate species

Oncor recommends choosing based on:

• climate and soil adaptability
• pest resistance
• solid structure, not just speed of growth

Smaller species that can work in tighter spaces if planted away from lines include crape myrtle, Texas mountain laurel, Mexican plum, and other low-mature-height trees suited to Texas conditions.

4. Plant correctly for root health

Best practice from Oncor:

• dig a shallow, wide hole
• hole width up to 3x the root ball
• hole depth no deeper than the root ball

This matters in compacted Texas soils where roots need oxygen and room to expand.

Why this matters for your energy bill too

Smart shade placement can reduce heating and cooling costs by up to about 20 percent.

But only if the tree can mature safely. Trees constantly hacked back by emergency trimming deliver less shade and more problems. Proper planting plus Oncor vegetation management equals:

• lower summer usage
• fewer power outages
• healthier trees with longer lives
• safer neighborhoods

Power Move: Shade your home like a pro. Keep every mature canopy away from power lines like your fridge depends on it. Because it does.

Gatby’s take

Oncor vegetation management keeps the grid reliable. Texans help by planting trees the right way and never doing tree trimming near power lines themselves.

If you are moving or re-shopping electricity, Gatby helps you compare Texas plans fast so you can lower bills without guessing.

Reliability keeps your lights on. A smart plan keeps your bill down. Do both and you win Texas summer.

FAQ: Oncor vegetation management and tree trimming in Texas

How often does Oncor trim trees?
Oncor uses a proactive vegetation management cycle. Trimming frequency depends on tree growth rates, prior pruning history, and local outage or reliability data. Areas with faster growth or more vegetation-related outages get trimmed more often.

Why did Oncor trim my tree unevenly or “one-sided”?
Oncor performs line-clearance pruning, not beauty pruning. Crews only trim the parts of a tree that could contact energized power lines, so trees can look lopsided even when the work is correct.

Does Oncor notify homeowners before tree trimming?
Yes. For planned maintenance, Oncor typically leaves a door card or notice ahead of work in your area.

Who is responsible for tree trimming near power lines?

• Pole-to-pole / main overhead lines: Oncor is responsible for trimming vegetation near energized conductors.
• Service drop (pole to your home/business): The property owner is responsible, but must coordinate with Oncor for safe work.

Can I trim a tree if it is close to a power line?
No. Oncor warns customers not to trim within about 10 feet of energized overhead lines and not to hire unqualified crews to do so. Call Oncor instead.

What if I need trimming near the service wire to my house?
Contact Oncor first. For a nominal fee, they can temporarily disconnect service so qualified trimming can be done safely.

Does Oncor trim trees around cable or phone lines?
No. Oncor only trims around electric lines. Cable television and phone lines are not part of their trimming scope.

Will Oncor clean up branches after trimming?
Yes, Oncor removes debris from planned pruning work. After major storms, cleanup may take longer because restoring power is the priority.

Why is vegetation such a big cause of power outages in Texas?
Storms and high winds can push limbs into overhead lines, causing faults and outages. Preventative tree trimming and smart planting reduce that risk dramatically.

How do I plant trees so they never cause outages?
Follow Oncor’s “Know Before You Grow” approach. Plan locations, avoid planting under lines, and match species to mature height zones so trees will not grow into power lines later.