Root Cause Arboriculture LLC

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Root Cause Arboriculture LLC Root Cause Arboriculture LLC — Mesa’s consulting-first tree care company. ISA Certified Arborist WE-14620AT. Where every cut has a reason. 📍 East Valley, AZ

Prescription pruning, health assessments, pre-purchase inspections & written arborist reports.

Meet the chaste tree (Vitex agnus-castus): heat-tough, pollinator-loving, and already throwing purple blooms. But look p...
08/19/2026

Meet the chaste tree (Vitex agnus-castus): heat-tough, pollinator-loving, and already throwing purple blooms. But look past the flowers at the setup!

A berm, not a buried trunk. See the ring of soil built up around the base? That holds water where the roots can actually use it and directs it out to the root zone — instead of pooling against the trunk, where buried bark and standing water start root collar rot.

Irrigation that moves. No emitter strapped to the trunk. This is an above-ground line with a flood emitter I can reposition as the tree grows and its roots spread outward. The water goes where the tree needs it — not where a fixed dripper happened to land three years ago.

No stake. A young tree left to flex in the wind builds its own trunk strength and a stronger root system. Staking a tree that doesn’t need it makes it dependent and weak. This one stands on its own, the way it should.

This is the whole correction. It cost nothing but a trowel and an afternoon.The gravel is pulled back several feet. The ...
08/17/2026

This is the whole correction. It cost nothing but a trowel and an afternoon.

The gravel is pulled back several feet. The soil sits at the level the tree was grown at, not four inches above it. The flare is exposed and dry. Water goes to the roots instead of pooling against bark.

That’s it. No treatment, no product, no equipment.

The thing worth knowing is that this doesn’t hold on its own. Gravel migrates back. Soil washes in. A ring like this needs looking at once a year, and it takes about a minute to check.

Most of what goes wrong with desert trees isn’t dramatic. It’s four inches of soil, sitting somewhere it shouldn’t, for a decade.

Most people have never seen the bottom of a tree.This is what it’s supposed to look like. The trunk widens where it meet...
08/15/2026

Most people have never seen the bottom of a tree.

This is what it’s supposed to look like. The trunk widens where it meets the ground, and roots spread outward from that widening in every direction. That widening is the root flare, and on a healthy tree you should be able to see it.

Before this photo you couldn’t. Three to four inches of soil sat on top of it, held there by brick pavers set a foot out from the trunk. A flood emitter filled that bowl every cycle.

So the flare stayed buried and it stayed wet. Bark that was never meant to hold moisture held it, year after year.

Here’s the test, and it takes thirty seconds on any tree you own: a buried trunk goes into the ground like a fence post. Straight down, no taper. If you can’t see it widen at the base, something is covering it.

Two pots of soil came off this one. All of it by hand, with a trowel.

This is the cheapest diagnostic tool in tree care, and almost nobody uses one.It’s a soil probe. You push it in, pull it...
08/13/2026

This is the cheapest diagnostic tool in tree care, and almost nobody uses one.

It’s a soil probe. You push it in, pull it out, and you’re holding a core of everything happening in the top foot of the root zone.

This one came out of ground that gets flood irrigated every 13 days, pulled four days after the last soak. Dark, moist, crumbly, still holding structure that deep. That’s a root zone doing its job.

On another property recently, the same probe wouldn’t go in an inch.

That’s not a difference in dirt. That’s what happens when a root zone gets compacted, covered, and watered on a schedule built for something other than a tree.

A tree can look fine above ground for years while the soil under it quietly stops working. By the time the canopy tells you, you’ve lost time you can’t get back.

Thirty seconds, and it’s the first thing I do on every property I walk.

These roots hit a wall and turned. You can see where.Follow the two running down the left side. They travel a long curve...
08/11/2026

These roots hit a wall and turned. You can see where.

Follow the two running down the left side. They travel a long curve instead of heading out and away — and the line they’re following is the edge of the hole this tree was planted in.

Roots take the easy path. A planting hole backfilled with soft amended soil gives them a soft pocket to fill, and they stop where the compacted native ground starts. Then they turn and run the perimeter, circling the tree instead of anchoring it.

Left alone, some of these eventually cross the trunk and tighten as both keep growing. That’s a girdling root, and it can take decades to kill a tree.

The ones on this tree got cut. That’s a judgment call, not a default — there’s a limit to how much root you can remove at once, and the wrong cut costs the tree more than the root was costing it. Not a shovel-and-guess job.

The real fix happens on planting day: dig wide instead of deep, backfill with the native soil that came out, and break the sides of the hole so there’s no wall to turn at.

Two problems in this photo. Neither one looks like a problem yet.The emitter sits directly against the trunk. And there’...
07/30/2026

Two problems in this photo. Neither one looks like a problem yet.

The emitter sits directly against the trunk. And there’s no root flare — the trunk goes into the ground like a fence post.

On their own, each is a common mistake. Together they’re a slow failure: water held against buried bark, day after day, is how root collar rot starts. Meanwhile the absorbing roots that actually need that water are further out, getting almost none of it.

Neither shows up as a symptom for years. Then the tree declines and nobody can say why.

Move the emitters out to the root zone. Find the flare!

After months of building, we’re open — an ISA Certified, Prescription Pruning Qualified (PPQ) arborist practice right he...
07/04/2026

After months of building, we’re open — an ISA Certified, Prescription Pruning Qualified (PPQ) arborist practice right here in Mesa.

We do tree care a little differently: we diagnose before we prescribe. Before a single cut, we figure out what’s actually going on with your tree — then build a plan for that tree. Assessments, written reports, pre-purchase inspections, and structural pruning done to a written prescription.

Serving Mesa & the East Valley. Take a look 👇
https://www.rootcausearbor.com

Every tree has a story. Every cut has a reason.


My plant app called this a lemon-scented gum. It was wrong — and I get why.Eucalyptus are my favorite trees, and even I’...
06/18/2026

My plant app called this a lemon-scented gum. It was wrong — and I get why.

Eucalyptus are my favorite trees, and even I’ll admit the ones around the valley can be tough to tell apart. But this one gives itself away: those little red “helmets” capping the buds. That’s the operculum, and it’s the signature of Eucalyptus erythrocorys — the red-capped gum.

The cap pops off, out burst these golden pom-pom flowers, and later you get woody bell-shaped gumnuts up to 3 inches across. Gorgeous in person.

One thing worth knowing if you’ve got one: this species grows wide and carries a lot of weight in those limbs and fruit — which makes it prone to breaking in our monsoon storms. It takes structural pruning beautifully, though, when there’s a plan behind the cuts.

Apps are a fun starting point. But knowing how a tree grows, fails, and should be cared for? That’s a different thing entirely.

🌳 Anthony Miranda · ISA Certified Arborist · Mesa, AZ

Address

Mesa, AZ

Opening Hours

Monday 6am - 7pm
Tuesday 6am - 7pm
Wednesday 6am - 7pm
Thursday 6am - 7pm
Friday 6am - 7pm
Saturday 7am - 4pm
Sunday 7am - 4pm

Telephone

+14806663009

Website

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