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@arboristpass.comOct 5, 2026, 11:02 PM

Soil pH 🌳

Acidic (below 7): Most trees grow well slightly acidic, Very low pH: aluminum, manganese toxicity.
Alkaline (above 7): Iron and manganese become unavailable, Chlorosis: e.g. pin oak.

Free lessons: arboristpass.com/free #Trees #Arborist #TreeCare

Side by side: Soil pH. Acidic (below 7): Most trees grow well slightly acidic; Very low pH: aluminum, manganese toxicity. Alkaline (above 7): Iron and manganese become unavailable; Chlorosis: e.g. pin oak.
@arboristpass.comOct 5, 2026, 4:02 PM

The job briefing 🌳

✓ Brief everyone on site before work starts
✓ Hazards and controls, roles, signals, PPE, emergency plan
✓ At least once each day or shift
✓ Again when conditions change
✓ Document it

Free lessons: arboristpass.com/free #Trees #Arborist #TreeCare

The job briefing. Do: Brief everyone on site before work starts. Do: Hazards and controls, roles, signals, PPE, emergency plan. Do: At least once each day or shift. Do: Again when conditions change: a new hazard, crew member or method. Do: Document it. Under ANSI Z133-2026 the arborist in charge holds the briefing.
@arboristpass.comOct 5, 2026, 12:02 PM

Question of the day 🌳 (Diagnosis and Treatment)

D-shaped exit holes in the bark of an ash tree indicate:

A. Asian longhorned beetle
B. Emerald ash borer
C. Aphids
D. Spider mites

Answer upside down at the bottom of the image.

Free lessons: arboristpass.com/free #Trees #Arborist #TreeCare

Question of the day 🌳 (Diagnosis and Treatment): D-shaped exit holes in the bark of an ash tree indicate: A: Asian longhorned beetle. B: Emerald ash borer. C: Aphids. D: Spider mites. Printed upside down: Answer B, Emerald ash borer.
@arboristpass.comOct 4, 2026, 11:02 PM

Preparing for the Certified Arborist exam? ArboristPass covers all 10 domains: 48 short video lessons, 3 full mock exams (600 questions) and a study sheet for every lesson.

$129 for 12 months.

arboristpass.com/course #Trees #Arborist #TreeCare

ArboristPass: Pass the Certified Arborist exam. 48 short video lessons, every domain; 3 full mock exams, 600 questions; Flashcards and a study sheet per lesson. $129, 12 months' access. Independent course, not affiliated with or endorsed by ISA.
@arboristpass.comOct 4, 2026, 5:02 PM

Did you know? 🌳 Z133-2026 levels

Level 1 unqualified; Level 2 ≤750 V; Level 3 ≤35 kV; Level 4 line clearance, all voltages. (2017 terms included incidental line clearance.)

Free lessons: arboristpass.com/free #Trees #Arborist #TreeCare

Did you know? Z133-2026 levels. Level 1 unqualified; Level 2 ≤750 V; Level 3 ≤35 kV; Level 4 line clearance, all voltages. (2017 terms included incidental line clearance.) From the lesson Electrical hazards and minimum approach distances.
@arboristpass.comOct 4, 2026, 12:02 PM

Question of the day 🌳 (Pruning)

Under ANSI Z133, a worker not qualified for line clearance must stay at least what distance from a conductor of 50 kV or less?

A. 2 feet
B. 5 feet
C. 10 feet (3 m)
D. 1 foot, if wearing gloves

Free lessons: arboristpass.com/free #Arborist #Arboriculture #TreeCare

Question of the day 🌳 (Pruning): Under ANSI Z133, a worker not qualified for line clearance must stay at least what distance from a conductor of 50 kV or less? A: 2 feet. B: 5 feet. C: 10 feet (3 m). D: 1 foot, if wearing gloves. Printed upside down: Answer C, 10 feet (3 m).
@arboristpass.comOct 3, 2026, 11:02 PM

On the job 🌳 Try this week:

Check planting depth and the root flare before blaming a pest.

Free lessons: arboristpass.com/free #Arborist #Arboriculture #TreeCare

On the job: Check planting depth and the root flare before blaming a pest. From the lesson Diagnosis: signs, symptoms, biotic and abiotic.
@arboristpass.comOct 3, 2026, 12:02 PM

Question of the day 🌳 (Urban Forestry)

Which trees generally provide the greatest benefits?

A. Large, healthy, long-lived trees
B. Newly planted small trees
C. Declining trees
D. Trees removed early

Free lessons: arboristpass.com/free #Arborist #Arboriculture #TreeCare

Question of the day 🌳 (Urban Forestry): Which trees generally provide the greatest benefits? A: Large, healthy, long-lived trees. B: Newly planted small trees. C: Declining trees. D: Trees removed early. Printed upside down: Answer A, Large, healthy, long-lived trees.
@arboristpass.comOct 2, 2026, 11:02 PM

Writing specifications 🌳

1. State the objective
2. Name the method
3. Set the limits
4. Location and clearance

Free lessons: arboristpass.com/free #Arborist #Arboriculture #TreeCare

Step by step: Writing specifications. 1. State the objective: Why the tree is being pruned. 2. Name the method: Clean, thin, raise, reduce, structural. 3. Set the limits: Size of cuts, amount of foliage. 4. Location and clearance: Which parts, what distance.
@arboristpass.comOct 2, 2026, 12:02 PM

Question of the day 🌳 (Installation and Establishment)

Minimum root ball sizes for nursery and transplanted stock are given in:

A. ANSI Z133
B. ANSI A300 Part 4
C. ANSI Z60.1
D. The local zoning code

Free lessons: arboristpass.com/free #Arborist #Arboriculture #TreeCare

Question of the day 🌳 (Installation and Establishment): Minimum root ball sizes for nursery and transplanted stock are given in: A: ANSI Z133. B: ANSI A300 Part 4. C: ANSI Z60.1. D: The local zoning code. Printed upside down: Answer C, ANSI Z60.1.
@arboristpass.comOct 1, 2026, 7:08 PM

ArboristPass is live 🌳 Certified Arborist exam prep: 48 video lessons across all 10 domains, 3 full mock exams, ANSI Z133-2026 values.

From tomorrow: a question every morning, plus a key number, checklist or flashcard every evening.

arboristpass.com/free #Arborist #Arboriculture #TreeCare

ArboristPass is now live: Certified Arborist exam prep, built for the job. 48 short video lessons covering all 10 domains, 3 full mock exams with 600 questions, and ANSI Z133-2026 values throughout. Free: 3 lessons, no sign-up needed. Independent course, not affiliated with or endorsed by ISA.
@masonbennett.bsky.socialSep 30, 2026, 5:09 AM

Watching heavy branches sway over the roof during a storm is genuinely terrifying. finally taking care of the dead trees in the yard this week before winter weather really kicks in.

westportmarketplace.com/listing/a1tr...

#TreeCare #HomeMaintenance #Tree

Tree Care
@silverstartree.bsky.socialSep 28, 2026, 2:00 PM

⭐ Professional Work That Shows

Great trimming, thoughtful cleanup, and a happy client. ⭐🌳

👉 silverstartree.com
📍 Serving Vernon, Kelowna, Lake Country & the North Okanagan.

#SilverStarTree #HappyClients #CustomerReview #TreeTrimming #TreeCare #OkanaganBC

@woods4thetrees.bsky.socialSep 28, 2026, 7:18 AM

Discover a heartfelt letter about tree care in Brunswick, Maine, highlighting community engagement and the importance of nurturing urban forests.

woodsforthetrees.org/2026/09/16/s...

#trees #usa #correspondence #treecare #community

@silverstartree.bsky.socialSep 26, 2026, 2:00 PM

Spring Canopy Care
Nature's beauty is thriving, and so are your trees! Our expert crew is out ensuring healthy branches and safe surroundings with professional pruning and maintenance.

silverstartree.com

#TreeCare #SpringPruning #TreeTrimming #HealthyTrees #SilverStarTree

@southgreentreecare.bsky.socialSep 22, 2026, 5:01 PM

Trees Getting Too Wild? It’s Time for a Trim.

Looking for tree trimming near me or tree removal near me?

Website: southgreentreecare.com
Google Maps: https://www.google.com/maps?cid=6942174856134856566

#TreeTrimming #TreeRemoval #TreeService #TreeCare

@silverstartree.bsky.socialSep 19, 2026, 2:00 PM

See something unusual in your trees? Let the Silver Star Tree crew take a look.

👉 silverstartree.com
📍 Serving Vernon, Kelowna, Lake Country & the North Okanagan.

#SilverStarTree #TreeCare #TreePruning #Arborist #TreeHealth #OkanaganTreeService

@silverstartree.bsky.socialSep 17, 2026, 2:00 PM

Vernon’s Commercial Past

🏛️ A look back at Vernon’s commercial past and the buildings that helped shape downtown.

👉 silverstartree.com

#ThursdayThrowback #VernonBC #VernonHistory #CommercialProperty #TreeCare #SilverStarTree

@masonbennett.bsky.socialSep 15, 2026, 12:43 PM

Thinning out dense canopies this week so the lawn beneath actually gets some sunlight and airflow. Simple routine maintenance that keeps mature trees healthy.

www.citableesg.com/org/a1-tree-...

#TreeTrimming #TreeCare #Connecticut #Tree

Tree trimming
@ashs-hort.bsky.socialSep 13, 2026, 12:00 PM

Improper or careless lawn removal can damage tree roots and lead to tree decline or death. "Preserving Trees During and After Lawn Removal" provides guidance on how to protect trees while removing turf. https://digitalcommons.usu.edu/extension_curall/2503/ #TreeCare #Horticulture

Hands carefully lifting a sod patch from soil, illustrating tree preservation during lawn removal by Utah State University Extension.
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