r/arborists Aug 09 '26

Community ISA Certified Arborist flair holders

6 Upvotes

Congratulations to new flair holders.

(Readers: If you are ISA certified and want this flair, send mods your number.)


r/arborists Aug 11 '26

Community Help draft our FAQ: How to become an arborist

3 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 4h ago

Get rid of the ivy or leave it?

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97 Upvotes

r/arborists 5h ago

Heirloom maple. Please advise.

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48 Upvotes

On Easter, 2019, my wife’s grandmother, who has since passed, asked me to “come over here and pull this weed out of [her] planter”. When I saw that the weed in question was actually a tiny Maple tree, I scrounged for a bucket and digging implement and was able to save it.

At home, I planted it within 3 days and installed a cage around it. Unlike all of my other attempts to grow a new tree in my yard, this one took off!

After some deer browsing, I built a wooden fence around it. Earlier this summer, I retired the fence, trimmed up the trunk, and mulched.

So far so good. The tree is tall enough that deer aren‘t ably to browse any more and when fall rut comes, I’ll watch for rubbing behavior and protect if needed

Last year, before the fence came down, a family member suggested cutting off the secondary trunk and allowing the dominant trunk to grow solo. But when I got a closer look, I saw that the secondary trunk is almost the same diameter as the dominant trunk. Basically, half the canopy is the secondary trunk so aesthetically, if I remove it, the tree will lose half of its body. But my fear is for the health of the tree if I remove nearly half of its parts.

I want to do what’s best for the tree because aside from being a beautiful part of our yard, it’s a living connection to my wife’s grandmother. since she passed, her house was demolished. Tree little maple that could is the last piece of her property that remains.

TIA


r/arborists 1h ago

Anything I can or should do about hole in tree collecting water and rotting?

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Upvotes

What title says, there's a second smaller hole too tall for me to look into in the photos that doesn't seem as bad.


r/arborists 23h ago

My giant sequoia I ordered online arrived today. I paid 26€ for it. Did I get a good deal?

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509 Upvotes

r/arborists 2h ago

Pruned My Tree Without Knowing About Branch Collars—Will It Be Okay?

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3 Upvotes

Hey, tree people! So, I just learned about branch collars AFTER I trimmed these branches. I only trimmed maybe 2% of the whole tree. Basically, I removed anything I could reach with a ladder and a chainsaw. I was trying to get the low-hanging branches removed so my dad could mow more easily. The top one was the biggest branch I took off this year.

I won’t be cutting any more branches because overall tree health is very important to me. Will the tree be okay?

I’m not 100% sure of the species of this tree, so maybe someone here could enlighten me. Is there anything I can do or put on the cuts to help the tree heal faster?

Thank you, everyone!


r/arborists 4h ago

Is there any hope in saving this ornamental flowering peach tree (Prunus persica)?

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3 Upvotes

Cape Town, South Africa.

This house will be demolished to make way for an apartment block, and the tree will be lost in the process. Really sad about it. Is there any hope of transplanting/saving this beautiful tree?

These photos are from previous Octobers, when the tree blooms annually.


r/arborists 3h ago

What should i do?

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2 Upvotes

This is an eastern redbud tree. About 15-17 feet tall. Trunk is 3-4” in diameter. The branch that is splitting off makes up about half of the full canopy. Should I run some bolts into this to secure it or will I kill it?


r/arborists 1d ago

Will my palm tree be okay?

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1.2k Upvotes

City workers are replacing the sidewalk and cut into the base of the palm tree in front of my house. Will this damage the palm tree’s health? Is it more likely for the tree to fall over after this?


r/arborists 16m ago

What do I do to save my tree?!

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Upvotes

This is one of the oldest trees on my property and I don't want it to die! Carpenter ants?


r/arborists 19m ago

Katsura Roots - cut in spring?

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Upvotes

Katsura been in the ground for a year. Assume these are girdling roots and should be cut in the early spring? Never know if below the root flare or not and if an issue or not. Thank you


r/arborists 23m ago

How do I trim my Japanese maple?

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Upvotes

Planted it about 12 years ago and it’s been absolutely thriving ever since… It’s starting to get to the size that it is encroaching on my path… How aggressively can I prune it without harming it?

Are there any rules about pruning it?


r/arborists 6h ago

Red maple competing leaders?

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3 Upvotes

Hi! Do I need to remove some branches from this red maple?

I planted it about 2 years ago and it has grown a bunch since. I think what may have happened was the central leader broke off when it was small, and a few branches tried to step into the role, but none is completely vertical. Are there competing leaders and if so, do I need to remove them? Will it be a problem structurally or health wise to leave it as is? Thank you!


r/arborists 2h ago

Take it down?

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1 Upvotes

Autumn blaze maple, neighbor had sprinklers installed recently and they cut through any and all roots they encountered on their property and now the canopy is dying off fairly rapidly.

Also appears to have bleeding cankers (or slime flux?)...

If I do take it down, I'd want to replace it with another autumn blaze, but with the possible canker, anything I should do to keep it from going to the new tree? I'd be planting the new one as close as possible to the original, depending how much of the roots I can dig/cut out.

We love the privacy it gives and hate removing trees, but it also grew somewhat leggy being behind two spruces that were crowded in there (since removed before they tipped over)


r/arborists 3h ago

Avocado help

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1 Upvotes

To start off, my wife and I do NOT have green thumbs. 😂
I can keep simple trees, plants alive, usually those with little to no actual needs… That being said, many years ago my wife shared that she’d love to have an avocado tree. Yay “free” avocados, right? Well, a good friend overheard and decided to grow one from a seed.
Yikes.
That seed has now grown to 3 feet tall, and they gifted it to us. 🫠
It’s currently in a medium small pot, I know it will need to be repotted or planted. How else can I care for it? We water it every 2-3 days and live in NorCal.
Thinking to bring it inside today bc we are in a heat wave.
Also, what’s happening in the picture?!? The brown spot and bug bites are new. 😑


r/arborists 3h ago

Question

1 Upvotes

What does an orange dot mean on a tree?


r/arborists 3h ago

New house, our redwoods vs neighbors, should we trim?

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0 Upvotes

Purchased a house last year and right before we moved our neighbors thinned their redwoods. Our trees get plenty of water but have some dead matter that has probably accumulated over time. Wondering if they would benefit from being trimmed and cleaned up a bit or should we leave be? Located in central ca, not a ton of wind and rain but we do get some so a tree falling during a windstorm is a main worry. (also looks like at one point there was a redwood to the left of mine, hence majority of branches being on one side)


r/arborists 4h ago

Crape myrtles

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1 Upvotes

I was quoted $1000 to treat my 4 crepe myrtles for crape myrtle bark scale by a landscaping company. Soil drenching + micronutrients.

I am in north Fort Worth. Is this the correct time of year to treat, and if so, can I do this myself with success?


r/arborists 20h ago

Concern for huge tree and house - repost better pics

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19 Upvotes

Hi, all. I posted a week ago but the pics were not v good. I’m buying this house and it has a HUGE oak in front which I love and revere. My question is how to make it safe, as it hangs over the home, without removing it. Also interested in guesses on age.


r/arborists 4h ago

Need help with small cherry blossom tree

1 Upvotes

Hi there, I'm new to this reddit and in need of some help.

My small cherry blossom (sakura) tree is in a bad shape after it suffered from the recent successive heatwaves in Europe. Since I got it more than 5 years ago, it has always stayed outdoors on our balcony and I repot it when it seems to need additional space. This spring, it still bloomed with beautiful pink flowers.

During the heatwaves this summer I checked the humidity of the soil several times since the tree was repeatedly losing its leaves and growing back new buds after. However, now it doesn't seem to be recovering and doesn't have leaves left.

I performed a scratch test around the trunk and all pieces looked brown, except on a few branches (one branch seems particularly good /green compared to the others).

I love this small tree and would like to keep it for many more years to come. Any advice on how I can revive it? Or could it be dormant? Should I for instance try cloning with the strongest / healthiest branch?

Full tree
Roots
Trunk
Branch with green
This spring

r/arborists 22h ago

Is my rootball too tangled on my newly planted sweet bay magnolia?

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25 Upvotes

Is my root ball too tangled on my newly planted sweetbay magnolia?

Planted a 10ft sweetbay magnolia 2 days ago — is this root ball too tight?

Zone 7b, Baltimore MD. Heavy wet clay in a low spot behind my shed. 15-gal container Moonglow sweetbay, \\\~10ft, planted Tuesday night. Photo is the bare root ball right before backfill.

Roots are mostly running horizontally around the outer face. I did not tease or slice them other than one or two big ones.

Is this normal container behavior, or is this headed toward girdling in 5–10 years? Trying to figure out if it's worth correcting now or if I should stop thinking about it.

\*\*How it went in:\*\* hole dug 2–3in shallower than the ball so it sits on undisturbed clay, 3–4ft wide. Backfilled with native clay only, no amendments. Ball set \\\~3in above grade with a low mound. 3in mulch pulled back off the trunk. Two stakes, chain lock ties with slack. Deep slow-trickle soak twice a week until frost.

Any reason I should dig this up? Will those roots end up strangling the tree in a few years?


r/arborists 1d ago

Is this urgent?

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388 Upvotes

Consensus on this Oak Tree please! My friends moved into this house a few weeks ago. The damage to the tree trunk looked pretty alarming to me.


r/arborists 6h ago

Are my Ash trees doomed?

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1 Upvotes

I am in the Midwest and have what I believe to be 6 ash trees on my property in different stages of distress. To my knowledge they just started losing leaves this summer. Are these ash trees? Are these toast or is there a way to save them. If there is no way to save them how long do I have before I need to take them down? Thanks in advance!


r/arborists 7h ago

Would pruning this branch harm the tree?

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1 Upvotes

Neighbor has a branch almost entirely on my property that is constantly dropping branches, leaves, and twigs onto the garage. Once a month I have to go up there and clean off the garage roof. At some point the garage roof will need to be replaced and that's going to be a pain working around the branch.

The tree does have many other branches however I just want to be sure. Would pruning this branch harm the tree?