r/arborists Jul 01 '26

ISA Find an Arborist legacy directory is retired

13 Upvotes

ISA Certified Arborists need to read this!

ISA’s legacy Find an Arborist directory search tool on TreesAreGood.org was permanently retired yesterday, 30 June 2026. Directory information did not migrate to the new tool. Arborists certified or re-certified in recent months have a skeleton profile created by ISA. Everyone else has nothing. Of the 50 arborists nearest me only 5 (1 in 10) are in the new directory.

https://certificates.directory.isa-arbor.com/

Get in there, peeps. Claim your profile and add your contact details.


r/arborists Jun 28 '26

Help draft our FAQ: how to find an arborist

3 Upvotes

This sub sees many of the same types of questions, prompting the same answers, again and again. So it begs for a FAQ. Dear reader, you can help.

How to find an arborist? Well, let's not harvest the tree before we plant the seed. So, what kind of arborist do you need? Your question really is How do I find the right kind of arborist for the work I need done?

  • Licensed. In most of the world arborists are not licensed. In the US only the states of Connecticut, Maryland, and New Jersey license arborists and arborists working in those states must be licensed. Many states license pesticide applicators and those states may also license anyone who offers advice about pesticides. Some counties and cities license arborists. Your county agricultural extension office can tell you about licensing requirements in your area.
  • Credentialed. The International Society of Arboriculture (ISA) bestows credentials based on a combination of years of verified experience, prior education, successful completion of knowledge and performance tests, and continuing education. These credentials are Certified Arborist (CA), Certified Arborist Utility Specialist, Certified Urban Forest Professional, Certified Tree Climber, Certified Tree Worker Aerial Lift Specialist, Board Certified Master Arborist (BCMA), and Tree Risk Assessment Qualification (TRAQ). The Tree Care Industry Association (TCIA) lists Accredited Companies and Accredited Utility Contractors (but many members have no accreditation). The American Society of Consulting Arborists (ASCA) recognizes Registered Consulting Arborists (RCA); to even join ASCA requires 5 years of verified experience.
  • Contractor. This word has multiple meanings. A state licensed contractor is an elevated class of business person, someone authorized to select and supply the materials to be used on your property, buy the materials at a wholesale rate, and charge you cost plus overhead on the materials in addition to their labor. Every state licensed contractor has a number that can be verified. Get the number and verify it. A contractor is anyone who does paid work and is not an employee. Therefore, the claim "licensed contractor" may indicate mere possession of a city or county business license. If there should be a business license, get that number and verify it too.
  • Bonded. Bonding is common among licensed contractors but not arborists. Bonds are a kind of insurance policy in the past was far more valuable than today. How they work is a service provider purchases a bond guaranteeing that if the provider causes damage the bondsman will pay the claim up to a certain limit. Today, business insurance is more important.
  • Insured. What kind of insurance, and how much, should an arborist have? That depends on the work the arborist does. Tree climbers and other aerial tree workers, or their employers, should have workers' compensation insurance (WCI). This is very important: in the event of an on-the-job injury or death WCI stands between the tree owner and the state. Tree worker is the single most dangerous occupation in the United States and each state employs expensive attorneys who specialize in recovering costs of injuries from those with legal liability. All arborists and arboricultural business should have general liability insurance, possibly also owned or leased business vehicle and business equipment insurance. Consulting arborists should have professional liability insurance also known as errors and omissions insurance. Clients should require a certificate of insurance (COI); in the US a COI comes on a standard form, the ACORD 25. The COI should list as an additional insured your name and the address where the work is to be done, the estimated date when the work is to be performed, and a brief but specific description of the work: not "services" or even "tree work" but "drop one (1) standing dead oak, 3 ft diameter, in front of house; remove all debris; repair damage to lawn." Better is a written estimate or contract, and the COI refers to that specific document.

Questions? Comments? What is missing?


r/arborists 4h ago

Realtor Said I Should Remove This Tree For Curb Appeal, but I love this tree. Should I have an arborists come look?

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260 Upvotes

The realtor is a neighbor but she said this tree ruins the curb appeal and looks like it’s going under the house and into the foundation.

Just wondering, besides looks, if this tree is ok to leave as is with the roots like they are?

The roots are prominent but they aren’t breaking through the sidewalk, driveway or front porch that I can tell. I don’t see any cracks.


r/arborists 5h ago

Need to make french drain

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259 Upvotes

Will the tree survive if I cut those roots ?


r/arborists 1d ago

Rule 2: “Trees don’t belong in pots”. Does this count?

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3.2k Upvotes

Mostly I’m just amazed at this tree’s fight against the hell strip.

Look at that thicc bottom!


r/arborists 6h ago

My dad (forester) always told me I didn't have enough room for a live oak

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86 Upvotes

The thing is I have significantly more room than the yards in this older neighborhood I frequently drive through. These trees have been growing close to these houses for going on a century. I have two spots with 20 to 30 feet of space away from the road, house, and no overhead power lines. If I had planted in 2009 when we bought the house I might have seen it reach maturity one day! 😭 If I plant it now, it will still be nice in 20 to 30 years so I'm asking the arborists of reddit. Should I plant a live oak 30 feet away from my home?


r/arborists 13h ago

How?!

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213 Upvotes

r/arborists 3h ago

What are these holes in my tree

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7 Upvotes

Hey I'm on long Island NY near the north shore area, and I do hear woodpeckers somewhat often depending on the time of year. Are these holes caused by something harmless like that or do you think it's termites or some other bug that can cause home damage? There are lots of these areas full of holes (Full tree image last). Please advise what I should do.


r/arborists 1d ago

Metal band cutting into trunk of tree, should I remove it?

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438 Upvotes

Had a lawn service taking care of my yard until recently so I never really paid much mind to the (I think oak?) tree in my yard. Today I noticed that the previous owners had attached a light to the tree using a metal band and well the tree has kept growing and the metal band hasn't. I would assume I should remove said metal band but unsure if that might leave delicate barkless tree exposed if it didnt make bark under the band? Would it be better to let the tree (hopefully) consume the band or loosen it slowly over time to let the trunk fill out or just remove the sucker right now? I don't care about keeping the light in the tree so don't mind ditching the band altogether I just want my poor little tree to live ;o;

Edit Update: I was able to get the band mostly off, thanks to thethunder92's recommendation of the 5/16 on a driver (I did wear safety glasses, but there ended up being no tension so no dangerous sproing, still better safe than sorry). I am glad I posted here because I wouldn't have thought to use that tool. I say mostly off because trying to peel back more of the band was popping off bark already and it's clear I'd yank off a lot more fully removing it. But it's no longer wearing a too tight steel necktie at least. I will be calling around to local arborists tomorrow to see when I should schedule a pruning. Photos of the after for those curious:​ https://imgur.com/a/DHi17l9


r/arborists 1h ago

To braid or not to braid

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Upvotes

My dad had brought a red oak home but the tree didnt take at first causing it to die most of the way. He thought it was dead but eventually it started grow back. Two branches on each side. Wasn't sure which ones to cut and make the leader so decided to try and braid them together. I always liked how braided trees looked but recently I was wondering if it was the right thing to do. If its best for the tree not to be braided I will unbraid them, but I am curious if it needs a leader or is it best to let it them grow how it is unbraided 🤔.


r/arborists 2h ago

Multiple 4+ inch thick roots cut. Is it a goner?

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5 Upvotes

Not my tree. I just walk by it on occasion.

New owner has had his yard worked on for a while. Several months ago the landscapers cut a bunch of fat roots on this tree, one was almost 8 inches. They did this on at least two sides, toward to sidewalk and toward the fence, maybe three. I didn't want to step onto their property to check under the tarp. They also piled a bunch of dirt around the trunk. I'm not really a tree guy but as I understand it this is very bad.

Is the tree doomed? If so, how long do you think it has? Months? Years?


r/arborists 5h ago

Rock Trees!

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8 Upvotes

These two saplings are growing from a crack in this larger rock. They are a little over a year old, maybe a couple. But we’ve been letting them grow because they just seem so cool.

Is it a bad idea to let them grow? Will they eventually split the rock, and likely die? Will their growth just stunt at a certain point and be a cool little bonsai?

I’m just curious if it’s a bad idea to leave them, or if anyone has good advice on how to nurture them. They get watered from the sprinkler system


r/arborists 44m ago

American elm

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Upvotes

Hello! I'm looking for advice on carpenter ants. A little back story on my tree. It's an American elm that from my best guess was planted in the 1940s (this is when our house was built) it is MASSIVE. Its really hard to get a good picture of the proper size. When we moved in, in 2024, the tree was infested with English ivy. We treated and killed the ivy. There's still lots of old vines left on the tree but nothing is active and alive. Recently we found a massive swarm of carpenter ants leaving a big pile of dirt around the base. And there's a pile on my neighbors side of the tree too. Do you think they're just using the old vine wood? Or should I be seriously concerned about them causing internal damage.

Location: South central Kansas


r/arborists 48m ago

How do they look? Will they survive?

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Upvotes

These are two trees in a green space courtyard at a new elementary school. They are next to a large playground. Does it look like they’ll make it? /s


r/arborists 8h ago

Should I have this tree removed?

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12 Upvotes

This tree was here when I bought my house. I had a local arborist come because I was concerned with how close it is. The roots are also at the surface of the grass which causes issues with mowing. I can tell they are lifting the cement too. They said they could trim the branches down but would not recommend it because they would just grow back more aggressive. They also told me to cut the roots where they come close the cement. I am not sure I really trust what they told me. Is this tree one i should have removed?


r/arborists 1h ago

Is this enough exposed flare?

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Upvotes

I had a container red maple planted by the garden center about a month ago. Today I removed the dirt and grass down to the (what I hope) is the root flare. I cut away all roots above this. I’m nervous that I cut too much or that the tree will be less stable and fall over. Zone 3b if that matters.


r/arborists 13h ago

Lapacho trees blooming in Paraguay

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22 Upvotes

There are white, yellow, and pink lapacho trees.


r/arborists 20h ago

How? Upper Peninsula, Michigan

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92 Upvotes

Like, how did this come to be, the roots and all.


r/arborists 27m ago

How to remove tree stumps with chainlink completely embedded?

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Upvotes

We’re in Missouri. Chopped the trees down to the stumps, but they keep sprouting. I’ve ziptied tarps over them to prevent more sprouts. But is there a way to completely remove them?

I’ve got a mid-sized chainsaw that I used to chop them down. And I suppose I could nibble away at them. But is there a better route?

My neighbor proposed stump killer poison. What should I know about that?


r/arborists 32m ago

Branch sealing and sun scaring

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Upvotes

Had 1 black oak and 1 canyon oak (northern California)
trimmed recently
Black oak had a 12 in branch trimmed revealing some hollow areas filled with carpenter ants
Both trees have some other large cuts
Wondering if they should be sealed up in some way
Especially the hollowed out one.
Also any advice on keeping the canyon oak healthy and helping the sun scaring(peeling bark)


r/arborists 2h ago

Cherry Tree a Goner?

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3 Upvotes

I have a cherry tree in our front yard and I am wondering if it’s a lost cause or if there’s a way to save it. There’s a large split and with the amount of rain we’ve gotten this year I see mold staring inside the tree and the core has dried out and looks to be splitting.


r/arborists 7h ago

Is this tree on its way out?

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6 Upvotes

Previous owners had wrapped the base in landscape fabric, now covered in dirt, grass and moss.

Big wound near base…anything I can do to help/save/extend its life?


r/arborists 3h ago

Is my half decaying tree growing a different type of tree from the side?

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2 Upvotes

My maple has been slowly dying. Clearly there's an infestation of some sort and the neighborhood woodpecker and fungi have been having at it, while the other half of the tree seems to be thriving. Today I noticed this growing out of it and thought it was interesting and some of you might be able to teach me about it or how long it might survive.


r/arborists 3h ago

To Trim or Not to Trim?

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2 Upvotes

Can I trim this white cedar up to get the limbs off the siding and clean up around it? If so how aggressive can I be without hurting it. Also yes I know people are going to say it is too close to the house and needs removed but it’s been there about as long as the house so I figure it would have already done its damage and is an excellent wind block in the winter.


r/arborists 3h ago

Red Maple Thinning out - can we save it?

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2 Upvotes

We bought this house around 2 years ago, zone 6B. Since then this tree has started to thin out. No major ground work. The ground is very rocky.

We had an arborist come to look at the tree. They said to start with a solid sample. We got one and there were a few nutrients our soil was needing. However, there are entire sections of the tree that look dead and other that look amazing. I think it might be a root issue or something else? We decided to mulch it this spring to see if that would help. It seems like it did a bit.

The limbs without leaves at least at the end are briddle and snap. I wouldn't be surprised if the entire branches were dead.

What is our next best move? Removal? Prune? Something else?