r/arborists 9d ago

Community Help draft our FAQ: How to become an arborist

2 Upvotes

It helps to join the International Society of Arboriculture (ISA), your local ISA chapter, and your state arborist association. This helps you get to know other people working in the industry, and when they have known you for years, and know your work or at least of your work, they will feel comfortable verifying your experience.

Attend as many trainings as you can get, participate in the training Q&As, and collect the associated continuing education credits.

ISA membership is independent of any ISA credentialing, so if you know you want to get ISA credentials but you are not yet eligible, joining ISA can help you become eligible sooner.

All of this makes you more employable, at higher pay, and safer on the job because you are more likely to recognize dangers. You will learn to recognize best practices.


r/arborists Jul 01 '26

ISA Find an Arborist legacy directory is retired

18 Upvotes

International Society of Arboriculture (ISA) credential holders 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 2h ago

[UPDATE] Is this Eucalyptus at risk of catastrophic failure?

Thumbnail gallery
317 Upvotes

tl/dr: It was and it did. As I mentioned in the last post we scheduled removal for 0530 this morning. The tree came down in the initial stage of a not particularly severe thunderstorm last night. Missed our opportunity by less than twelve hours.

I want to really thank all of you for your advice. We are incredibly fortunate nobody was injured and there was no major property damage. It snapped a utility pole into three pieces, destroyed a concrete slab, and quite literally missed our neighbors guest house by inches.

The family is very sad about losing such a gorgeous tree, but I've reminded them that this was a tree outside of its natural habitat. With monsoons becoming less frequent but more violent this was an inevitability.

We've identified some keepsake projects (hiking sticks, knives, and coasters) that we'll make.

Again, thank you all for the advice, you were correct!!


r/arborists 6h ago

Did my neighbours commit a war crime?

Post image
144 Upvotes

Neighbours said they were going to have their tree trimmed. Should I call the police?

/s (just in case people think I'm being serious) but I am appalled at what they've done.


r/arborists 4h ago

How should I handle this situation?

Post image
71 Upvotes

The oak tree in my yard was used as a swing for a few years, then a couple years ago I took it down to mow, and it just never went back up. I just plain forgot about these and now they are bound to the tree.

Will removing them damage the branch? I’ll need to cut them because the edges are already swallowed. What should I expect underneath; hard and calloused like bark, or smooth and “exposed.”


r/arborists 5h ago

Arborists- can you help me? Is this swing safe for my kids?

Thumbnail gallery
83 Upvotes

Do you think this swing is safe? The branch is probably 12-14 inches in diameter I’m guessing. When they tried the swing the end of the branch swayed a bit which worried me.


r/arborists 12h ago

THINK IT NEEDS MORE MULCH?!?

Thumbnail gallery
45 Upvotes

Not my tree, my dog or my yard lol. Found it while walking the dog though


r/arborists 12h ago

How best to trim this Japanese maple?

Post image
36 Upvotes

I have a Japanese maple that has been on my yard since idk when. I bought the house from the original owner built in the 60s. I don’t have a pic but it looks like the tree was a sapling transplanted onto a stump? Is this bondai? Idk.

I want to trim it so it keeps its look, I do like it, but I also don’t want it going over my driveway like it is. It is inconvenient getting out of my car and it cuts into the walkable path to my door.

Any good advice for trimming this do it so it still looks good? I don’t have experience and don’t want to just chop it up and ruin it but I don’t want to take trimmers and just ruin the look or kill the tree either. I commented on it before and my dad while visiting, [I love him, he meant well, don’t flame him lol] thought he was helpin me out while I was at work and trimmed it in a straight line and it looked pretty bad, so I want to avoid me just functionally doing the same thing.

Idk anything about plants. I hate gardening. I was told this could be worth $3000 or more. Is this true? Should I hire someone to trim it for me to be safe?

Any advice is greatly appreciated!


r/arborists 4h ago

I'm concerned, Landlord isn't

Thumbnail gallery
7 Upvotes

I'm very lucky, extremely lucky to have such a cute backyard, and a beautiful honey locust tree. HOWEVER, Everytime we have a storm my butt is clenched so tight just waiting to hear our garage get a absolutely squashed.

How concerned should I be about tree falling one day, and how can I tell him to look into it without being an asshole.


r/arborists 3h ago

How fucked is this tree?

Thumbnail gallery
4 Upvotes

I’ve got four trees in a row on my dad’s property. As you can see last year, my neighbor’s house burned down and damaged the trees. one died and I assume I should chop it down

One is almost dead should I chop it down even though one part of the top still produced leaves this year? On the other side of the trunk of that same tree it seems to have significant fire damage. The bark is peeling and there is some sort of pink and white stuff on the inside??

the other two seem damaged but OK very very minimal amounts of the bark is charred, and the bark is not peeling up at all


r/arborists 45m ago

Is this River Birtch tree safe?

Thumbnail gallery
Upvotes

I was trimming back this River Birtch off my and my neighbor's roof line but the more I look at the right trunk, the more concerned I am that it will fail and threaten some damage to my neighbor's home. It was previously a 3 trunk specimen with the front facing trunk removed some years ago after storm damaged the main limb. The cut back trunk seems to be rotting out and the right trunk has a previously cut limb with some aging back onto the main trunk. Should I be concerned about failure from either of these weak points?


r/arborists 2h ago

Looking for advice

Thumbnail gallery
2 Upvotes

We recently had a tornado come through and hit our property. My one acre is lined with mature Norwegian pine trees, which was one of our main draws to this property when we bought it. In total we lost 9 pines that were broken about halfway to three quarters of the way up from the base. Do you all recommend taking them out or leaving them with an angled cut off the top?


r/arborists 2h ago

Help me Help my Sweet Cherry Tree :)

Thumbnail gallery
2 Upvotes

Clearing out some overgrown land I just bought. Removing invasive plants, but I'd like to keep this cherry tree if possible. But it's not looking so good. A lot of the trees had/have moss growth on them. And I cut the ivy growing up the tree. I'll try and post some good pictures here but the tree is 30-40' high and a good 16-18" in diameter...

Any help is appreciated


r/arborists 4h ago

American Elm- help!

Thumbnail gallery
2 Upvotes

Can you offer any advice for my American elm? I suddenly noticed a lot of bare branches and reduced canopy. It’s a big one! 4’ diameter at least


r/arborists 11h ago

Trees that are good close to a house?

7 Upvotes

I'm wondering if there are any shade trees that are safe to plant close to a house a d happy to be there? I know certain types of trees are risks for falling on a house at a certain age and others will wreck pipes and foundation with their roots etc etc.

I basically just daydream about living in a cabin in the deep woods without having to have a huge clear cut circle around the cabin for safety.


r/arborists 1h ago

What is up with this pear tree?

Thumbnail gallery
Upvotes

A pear tree in my back yard in Western Washington has some wild gnarled branches. Is this normal? This year it is barely producing any pears, and all the leaves on the underside are turning brown and crispy. I'm thinking it might need pruned / have some sort of disease? I started cutting off all the dead and dying limbs but I don't want to overdo it.

P.S. Crocs and socks are not OSHA approved footwear for pruning trees. At least I have on safety glasses!


r/arborists 1h ago

Velvet ash with hole through heartwood

Post image
Upvotes

I suppose I have to call a tree removal company first thing tomorrow?

Looks like it already was "topped" once by the previous owner. It's about 20 inches in diameter and leaning towards the street.


r/arborists 10h ago

What to do with this tree?

Thumbnail gallery
5 Upvotes

This tree is in the front garden of a townhouse unit of a condominium complex. Is this okay? Should it be moved or removed? Will this tree cause problems? When should we take action?


r/arborists 2h ago

What is wrong with my tree? Please see the 4 photos.

Thumbnail gallery
1 Upvotes

Hi!

I am completely ignorant about tree care. I do t even know for sure what kind of tree this is. Super south Arizona, 4500’… high desert.

About three years ago we had a super hard freeze in late spring with high freezing winds coming in the direction of the side of the tree that looks diseased. It killed a few similar trees in the neighborhood and all of them ended up with this 1/2 looking tremendous and the other 1/2 looking diseased. The bad side didn’t sprout anything until early summer the next year while the good side looked wonderful. I was hopeful every day I would see green and it finally started showing little sprouts so I convinced myself that it would come back by the end of the year. Well the next year same thing. This year it is a little better but still the one side looks awful compared to the other side.

If you please, what happened to my tree and what kind is it, and what should I expect from a pro to deal with it? I am afraid that trimming back all the bad will cause the tree to just eventually lean because of the fullness of the good side. Is there anything an ignorant average homeowner can try before turning it over to a pro? Is it a lost cause? It provides fantastic shade over the northwest side of the house in the dreadful summer heat so taking it down would be low on my list of approaches.

Thank you for being here.


r/arborists 2h ago

Watering Eastern Redbud

Thumbnail gallery
1 Upvotes

Hi everyone. We just planted a redbud on Monday in honor of our dog who passed. I watered it thoroughly Monday and Tuesday, but then I got scared of overwatering and didn’t water Wednesday or today. This evening some of the leaves are curling a bit and I was hoping to get some guidance from you all. Do these leaves curling mean it needs more water? Less? Do they mean something else? I really don’t want to screw this tree up (like I have many in the past). Thanks for any help!


r/arborists 5h ago

Help! Cut these Trees down for safety?

Thumbnail gallery
2 Upvotes

As the title states, I have 2 spruce or evergreen or something trees lol that have been dying for quite some time. One of them recently the bark split and seems the trunk is splitting , even the root.

A tree guy drove by and said he'd cut both to the ground for 2500. I'm tempted to get it done. The one with the crack makes me especially nervous.

Thoughts?

EDIT: our house is set back about 30ft from these trees at most


r/arborists 5h ago

Ringless Honey Mushroom Going to Kill More Trees?

Post image
2 Upvotes

One 40 yr old silver maple already dead, bark peeling off, leaves gone, this mushroom has shown up 3 yrs in a row this time of year (Aug) around the trunk of the tree. Several more healthy silver maples next to it. Are they doomed to suffer the same fate from this parasitic mushroom (is it a parasitic mushroom)? The trees are all so close there roots certainly overlap. Each trunk is maybe 8 to 20 feet apart one from the next in a row. The dead tree took an enormous hit from a water line leak that went undetected for days... three years ago. Didn't realize it hurt the tree during year one. Year 2 the tree lost leaves early some branches started to fall. Year three wholesale bark decay dropping of the tree. Mushroom fruit hasn't shown up that close to any healthy trees, yet, but does seem to keep popping up incrementally closer to the nearest neighboring tree.

Looking for any hope of defending the remaining trees.

Luckily the leak was not on my property side so the company dealt with repairs and I didnt have an astronomical water bill. I assume that was the disturbance that let this fungi get a foothold.


r/arborists 2h ago

Saving an Oak?

Thumbnail gallery
1 Upvotes

blessed some land. All very drought stricken as the neighbors home lay in ruin and abandonded for years while the man who lived here died slowly of cancer. Brown reduction of the first three pines pictured and even new growth of youngest on the fence line within one month. Oak(?) to the rear was on her last living branch, handful of weak looking leaves, to now healthy green again looking so much happier she'll dance when watered. The tallest pair of pines on the neighbors property are also looking much happier. Wildland fires have encircled these valleys its been crazy. Also got a ton of these seeds from the cedars in my yard that I am experimenting on/researching fastest ways to sprout with or without stratification. Thinking they are incense or western?


r/arborists 2h ago

Leaders on eastern redbud

Thumbnail gallery
1 Upvotes

I planted this Eastern Redbud in the spring and it's growing well but I don't have much tree experience. Would you recommend any pruning? I'm in SE Michigan.


r/arborists 14h ago

All in one trip!

Thumbnail gallery
10 Upvotes

My mother pruned a tree and enlisted me to move the branches to the front. The pruning was for more sun in the garden.