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@arboristpass.comOct 10, 2026, 5:02 PM

Did you know? 🌳 Distances

Unqualified: 10 ft (3 m) up to 50 kV, farther above; includes tools and equipment; qualified workers use Z133 tables and PPE.

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

Did you know? Distances. Unqualified: 10 ft (3 m) up to 50 kV, farther above; includes tools and equipment; qualified workers use Z133 tables and PPE. From the lesson Electrical hazards and minimum approach distances.
@arboristpass.comOct 10, 2026, 12:02 PM

Question of the day 🌳 (Tree Biology)

Water-conducting cells in conifers are mainly:

A. Vessels
B. Sieve tubes
C. Tracheids
D. Ray cells

Answer upside down at the bottom of the image.

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

Question of the day 🌳 (Tree Biology): Water-conducting cells in conifers are mainly: A: Vessels. B: Sieve tubes. C: Tracheids. D: Ray cells. Printed upside down: Answer C, Tracheids.
@arboristpass.comOct 9, 2026, 11:02 PM

Choosing the level 🌳

1. Many trees, find the worst: Level 1
2. Individual tree, standard assessment: Level 2
3. Specific concern needs more data: Level 3
4. Agree the scope in writing: Level, trees, limitations

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

Step by step: Choosing the level. 1. Many trees, find the worst: Level 1. 2. Individual tree, standard assessment: Level 2. 3. Specific concern needs more data: Level 3. 4. Agree the scope in writing: Level, trees, limitations.
@arboristpass.comOct 9, 2026, 4:02 PM

Handling planting stock 🌳

✓ Lift by the root ball or container
✓ Keep roots moist and shaded
✓ Heel in bare-root trees if planting is delayed
✓ Cover trees in transit
✓ Plant promptly
✕ Lift by the trunk

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

Handling planting stock. Do: Lift by the root ball or container. Do: Keep roots moist and shaded. Do: Heel in bare-root trees if planting is delayed. Do: Cover trees in transit. Do: Plant promptly. Don't: Lift by the trunk: it breaks roots away from the ball. Covering trees in transit stops wind drying the leaves and bark.
@timnathchamber.bsky.socialOct 9, 2026, 12:05 PM

Timnath Chamber Member: Wisdom Tree Care INC is a home services business in Fort Collins, CO. A newer name neighbors can now find nearby. Find them in the Timnath Chamber member directory. #TimnathChamber #FortCollins #TreeCare #HomeServices #Landscaping

@arboristpass.comOct 9, 2026, 12:02 PM

Question of the day 🌳 (Soil Management)

On a fertilizer label reading 10-6-4, the first number is the percentage of:

A. Phosphate
B. Potash
C. Nitrogen
D. Organic matter

Answer upside down at the bottom of the image.

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

Question of the day 🌳 (Soil Management): On a fertilizer label reading 10-6-4, the first number is the percentage of: A: Phosphate. B: Potash. C: Nitrogen. D: Organic matter. Printed upside down: Answer C, Nitrogen.
@masonbennett.bsky.socialOct 9, 2026, 9:37 AM

Severe storms often leave hidden damage in mature yard trees. Don't wait for a falling branch to cause an emergency—always check for root heave or leaning trunks after high winds. Stay safe!

neustarlocaleze.biz/app/director...

#TreeCare #Connecticut #HomeSafety #Tree

Tree Service
@arboristpass.comOct 8, 2026, 11:02 PM

How ready are you for the Certified Arborist exam? Try our free sample questions from across the 10 domains, with every answer explained. 🌳

arboristpass.com/sample-questions #Trees #Arborist #TreeCare

ArboristPass: Try exam-style sample questions. Questions across the 10 exam domains; Every answer explained; No sign-up needed. FREE, Sample questions. Independent course, not affiliated with or endorsed by ISA.
@southgreentreecare.bsky.socialOct 8, 2026, 5:03 PM

South Green Tree Care provides dependable solutions for unwanted, damaged, and hazardous trees with experienced crews, professional equipment, and a strong focus on protecting your property.

Visit us: https://www.southgreentreecare.com/

#TreeRemoval #TreeCare #Arborist #TreeService

@arboristpass.comOct 8, 2026, 12:02 PM

Question of the day 🌳 (Urban Forestry)

In the US, trunk diameter at breast height (DBH) is measured at:

A. Ground level
B. 1 foot above the ground
C. The first branch
D. 4.5 feet (1.37 m) above the ground

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

Question of the day 🌳 (Urban Forestry): In the US, trunk diameter at breast height (DBH) is measured at: A: Ground level. B: 1 foot above the ground. C: The first branch. D: 4.5 feet (1.37 m) above the ground. Printed upside down: Answer D, 4.5 feet (1.37 m) above the ground.
@arboristpass.comOct 7, 2026, 11:02 PM

Number to know 🌳 Objectives first

Every pruning job starts from stated objectives; the specification follows from them

The course: arboristpass.com #Trees #Arborist #TreeCare

Number to know. Pruning (ANSI A300 Part 1): Objectives first. Every pruning job starts from stated objectives; the specification follows from them
@arboristpass.comOct 7, 2026, 4:02 PM

Levels of assessment, targets and site factors, at a glance 🌳

The lesson's summary on one page: save it for revision.

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

At a glance: Levels of assessment, targets and site factors. Level: 1: Limited visual; Method: Walk-by, drive-by, aerial; Use: Screen many trees for obvious defects. Level: 2: Basic; Method: 360° ground inspection, simple tools; Use: Standard individual-tree assessment. Level: 3: Advanced; Method: Specialized tools and techniques; Use: Specific concerns Level 2 can't resolve.
@arboristpass.comOct 7, 2026, 12:32 PM

Question of the day 🌳 (Safe Work Practices)

Escape routes for felling are planned at about:

A. Directly behind the tree
B. In the direction of fall
C. 90 degrees to either side
D. 45 degrees back from the line of fall

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

Question of the day 🌳 (Safe Work Practices): Escape routes for felling are planned at about: A: Directly behind the tree. B: In the direction of fall. C: 90 degrees to either side. D: 45 degrees back from the line of fall. Printed upside down: Answer D, 45 degrees back from the line of fall.
@arboristpass.comOct 6, 2026, 11:02 PM

Key point 🌳 Interaction

Abiotic stress often predisposes trees to disease.

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

Key point: Interaction. Abiotic stress often predisposes trees to disease. From the lesson Tree diseases and abiotic disorders.
@silverstartree.bsky.socialOct 6, 2026, 9:11 PM

🌳 Up High, Getting It Done

With the right equipment and experience, our crew can reach difficult areas and carefully tackle overhead tree work around homes and properties.

👉 silverstartree.com

#SilverStarTree #TreeTrimming #BucketTruck #TreeCare #ArboristLife #OkanaganTreeService

@arboristpass.comOct 6, 2026, 12:02 PM

Question of the day 🌳 (Diagnosis and Treatment)

Most infectious tree diseases are caused by:

A. Viruses
B. Fungi
C. Nematodes
D. Phytoplasmas

Answer upside down at the bottom of the image.

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

Question of the day 🌳 (Diagnosis and Treatment): Most infectious tree diseases are caused by: A: Viruses. B: Fungi. C: Nematodes. D: Phytoplasmas. Printed upside down: Answer B, Fungi.
@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.
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