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In 2011 I saw a tee in Singapore with ~1m fill all around, except for a narrow tree well, and pavement above that. In 2017 I saw it again and it looked fine. Good luck!

I would not drill holes in the trunk. The split can be reinforced enough by the structure. Nick Araya is TreeCareLA and very good with support systems. Mark Porter in Riverside could probably refer you to someone. And I would not waste time with risk assessment. Better to spend resources on...

Any followup on that inoculation work? Did the birds appreciate it? "infect" is judgmental; who are we to say what microbe is good or bad for the tree?

Many lindens have root issues from the nursery. Bartlett sprayed some for aphids in an OR shopping center, killed a pile of bees, and accelerated the anti-neonic movement. But a fine urban species if managed right!

We don't have a lot of ash but the green bug has arrived nonetheless. From what I read and hear, drenching works on smaller trees but larger trees have to be injected for effective control. Is this true? Why or why not? What diameter is the threshold? I have a few big ash trees under my...

Not only do they not mix, the numbers don't compute either. I've read a lot of TRAQ reports that were really not defendable.

I'll be pruning this champ red oak in Ohio this summer. Don't really want to do it for free but still negotiating some payment. http://www.historictreecare.com/wp-content/uploads/2014/12/DD-LLL-1406.pdf

Not too similar. QTRA is more quantified, UK based, guided by HSE thresholds. TRAQ is pretty much US based, and it's mainly about CYA Both need supplemental experience and training on inspection to transcend their defect-based, defensive modes, and yield defendable opinions.

Liontailed: Higher risk now than before the work.

There ya go; silly for an arborist not to have support systems in your toolbag. Re: to bolt or not bolt--for an open crack it is strongly recommended.

Here's what they are up to in Europe. Totally compatible with ANSI, ZTV, BS3998, QTRA, TRAQ, LANTRA, and the rest. If you have thoughts on either of these to share, they are taking comments this month...

A VERY few dollars; the cap costs $3. I think...Since I work T&M, that would add $3 to the M. Tight enough fit, no glue. As Rocky rightly says, the tree makes its own. Waste of time? We'll see the results. :) White pine in OH; kinda different from slash pine in FL. JD it's in the research...

https://www.homedepot.com/p/Charlotte-Pipe-6-in-PVC-DWV-Cap-PVC-00116-1400/203946149?cm_mmc=Shopping%7cTHD%7cG%7c0%7cG-BASE-PLA-D26P-Plumbing%7c&gclid=CjwKCAiApo3SBRA4EiwAty8i-vI9hx0kwkEDswSFtOpEILyQJqyZHUY_DjEM7QpxnWRBb9V-HfZMnxoCekgQAvD_BwE&gclsrc=aw.ds&dclid=COHAhIaYqtgCFUWAYgodUsIN5w

You could join next spring and take part!

Yup, pics and measurements taken twice a year. I don't expect any rotting, and I do expect faster scarring. We left two as controls.

Capping with tin is common in Montreal and some parts of France. At Biomechanics Week last year we reduced some white pine stems and used pvc caps over the tops. 4" and 6". The idea being to keep bad stuff out and promote sealing. I plan to peek at them next April

Cmon Jon; you know better than that.

That wasn't a letter; it was a book! But I tried to reply respectfully, even if his logic wasn't clear. Seemed more like faith than belief. Funny that the reply was 14 pages later.

Yeah we'll see what their next move is. I kinda doubt the case will turn on science or economics, but power.

Yesterday I climbed a baldcypress that is under transmission lines so it's in an ongoing court battle. The tree's response to last year's pruning puts the lie to the myth that reduction cuts to buds and small laterals aka "footing cuts" will trigger wild sprouting and rampant decay. Last June...