Introduction
Pruning is one of the most misunderstood practices in tree and landscape care. Ask ten homeowners what pruning means and you will get ten different answers. Some think it means cutting a tree back to reduce its size. Some think it means removing dead branches. Some use “pruning” and “trimming” interchangeably. The actual definition is more specific and more useful than any of these.
Understanding what pruning actually is, why it is done, and how it differs from simple trimming or cutting helps you make better decisions about your trees and communicate more effectively with the professionals you hire to work on them. It also helps you recognize the difference between good pruning work and damaging practices that are unfortunately common in the industry.
At 757 Tree Solutions we prune trees throughout Chesapeake, Virginia Beach, Suffolk, and Hampton Roads according to ANSI A300 pruning standards, the industry standard for tree care in the United States. This guide explains what those standards mean in plain language and what proper pruning looks like for Virginia homeowners.
What Is Pruning? The Actual Definition
Pruning is the intentional, selective removal of specific plant parts to achieve a defined objective. The key word is selective. Pruning is not indiscriminate cutting. Every cut in a proper pruning job has a purpose — to remove something specific for a specific reason.
The International Society of Arboriculture (ISA) defines pruning as “the selective removal of plant parts to meet specific goals and objectives.” [Source: isa-arbor.com/education/resources/pruning] ANSI A300 Part 1 establishes the specific standards for pruning trees and shrubs in the United States, covering cut placement, maximum removal limits, and acceptable pruning objectives. [Source: tcia.org/resources/ansi-a300-standards]
Trimming, by contrast, often refers to shaping or maintenance cutting that may or may not follow pruning standards. A hedge being trimmed with electric shears is trimming. An arborist removing specific dead branches from a live oak is pruning. Both involve cutting, but the purpose, technique, and standards applied are different.
Why Is Pruning Done? The Main Objectives
Safety
Removing dead, broken, or structurally weak branches reduces the risk of failure that could injure people or damage property. Safety pruning is the highest-priority pruning objective and the one that should never be deferred. A hanging dead branch over a walkway or driveway is a safety pruning situation that does not wait for the optimal seasonal window.
Tree Health
Removing diseased, dying, or pest-infested branches prevents problems from spreading to healthy parts of the tree. Improving air circulation through the canopy reduces the humid microclimate that promotes fungal disease. Removing crossing or rubbing branches prevents bark wounds that become entry points for pathogens. Health pruning extends a tree’s productive life significantly when done consistently over time.
Structure
Structural pruning establishes good branch architecture, particularly in young trees. Removing competing leaders, correcting codominant stems early, and establishing a clear primary scaffold prevents the structural failures that make older trees hazardous. A young tree pruned for structure in its first decade requires far less intervention — and poses far less risk — in its mature decades. The ANSI A300 standard specifically includes structural pruning as a defined pruning type.
Clearance
Removing branches that interfere with structures, utilities, vehicles, or pedestrian areas. Clearance pruning maintains the safe separation between trees and buildings, rooflines, power lines, and traffic. In Hampton Roads where storms are a seasonal reality, maintaining clearance from structures reduces storm damage risk significantly. See our guide on how often trees should be trimmed in Chesapeake VA for recommended clearance maintenance schedules.
Aesthetics
Improving the visual appearance of a tree or shrub through shaping. Aesthetic pruning is the lowest-priority objective — appearance considerations should never override health, safety, or structural needs. However, for ornamental trees and landscape shrubs, aesthetic pruning to maintain form and proportion is a legitimate and valuable practice when it does not conflict with higher-priority objectives.
Types of Pruning Cuts
Where you make a pruning cut is as important as which branch you are removing. Proper cut placement allows the tree to seal the wound efficiently. Improper cut placement creates large wounds that the tree cannot seal and that invite decay.
Branch Collar Cut
The branch collar is the swollen area where a branch meets the trunk or a larger limb. A proper pruning cut is made just outside the branch collar, angled slightly away from the trunk. This preserves the collar tissue that the tree uses to seal the wound. The branch collar cut is the standard removal cut for any branch being taken completely off the tree. You should never cut flush to the trunk (a flush cut) — this removes the collar and creates a large, slow-healing wound.
Reduction Cut (to a Lateral)
A reduction cut shortens a branch by cutting back to a lateral branch that is at least one-third the diameter of the branch being removed. This redirects growth to the lateral while maintaining the branch’s natural form. Reduction cuts are used to reduce the length or weight of a specific branch without removing it entirely.
What Never to Do: Topping
Topping — cutting branches back to stubs without regard to lateral placement — is the most harmful common pruning practice. It creates large wounds the tree cannot seal, stimulates weak fast-growing water sprouts, and causes long-term structural deterioration. The ISA has a published position statement against topping as a legitimate pruning practice. [Source: isa-arbor.com/resources/tree-care/topping] If a tree company recommends topping your trees, that recommendation is a red flag about the company’s knowledge of industry standards.
How Much Can Be Pruned at Once?
ANSI A300 and ISA guidelines generally recommend removing no more than 25 to 30 percent of a tree’s living canopy in a single pruning session. Removing more than this depletes the tree’s energy reserves, stresses the root system, and can trigger excessive, structurally weak regrowth. For mature trees, 10 to 15 percent removal per session is often a more appropriate target. The appropriate amount depends on the tree’s age, health, and the specific objectives of the pruning work.
Pruning vs Trimming: What’s the Difference?
These terms are often used interchangeably, but they describe different activities. Pruning is selective, purpose-driven, and follows specific standards for cut placement and removal limits. Trimming typically refers to shaping or maintenance cutting, often with power equipment, primarily for appearance or clearance.
In practice, a professional tree service visit often includes both: targeted pruning of specific branches for health or structural reasons, and trimming to maintain clearances and shape. The distinction matters when hiring: an arborist who prunes follows a different standard than a crew that trims. For large or structurally important trees, hiring to ANSI A300 pruning standards is the appropriate specification.
When Is the Best Time to Prune Trees in Virginia?
Late winter to early spring, just before new growth begins, is the optimal pruning window for most deciduous trees in Virginia. Wounds close quickly as the tree enters active growth, pest and disease pressure is lowest, and the bare canopy allows full visibility of the branch structure. For flowering trees like dogwood and redbud, prune immediately after flowering to preserve next year’s buds.
Safety pruning — removing dead, broken, or immediately hazardous branches — should be done any time of year regardless of seasonal timing. Dead branches do not wait for the optimal pruning window. For full seasonal pruning guidance specific to Hampton Roads, see our guide on how often trees should be trimmed in Chesapeake VA. [Internal link: Blog #11]
Frequently Asked Questions
Is pruning the same as cutting down a tree?
No. Pruning removes specific parts of a living tree while leaving the tree in place. Removing an entire tree is tree removal, not pruning. Pruning is intended to improve or maintain a tree’s health, structure, and safety, not to eliminate it.
Does pruning hurt trees?
Proper pruning does not harm healthy trees. Trees have natural compartmentalization mechanisms that seal pruning wounds efficiently when cuts are made correctly at the branch collar. Improper pruning — flush cuts, topping, or removing too much — does cause lasting harm. The technique is what determines whether pruning benefits or damages the tree.
How much does professional tree pruning cost in Chesapeake VA?
Professional pruning of a single medium-sized tree in Chesapeake typically runs $150 to $400 depending on tree size, number of cuts, and access. Larger trees with complex pruning needs can run higher. Multiple trees in one visit reduce per-tree cost since the crew and equipment are already on-site.
Do I need a certified arborist to prune my trees?
For small ornamental trees and shrubs, a knowledgeable tree service crew can do routine pruning work adequately. For large trees, structurally important trees, trees with health concerns, or any pruning work near power lines or structures, an ISA Certified Arborist is the appropriate standard. You can find certified arborists through the ISA’s public directory at treesaregood.org/findanarborist.
Conclusion
Pruning is one of the most valuable things you can do for your trees when it is done correctly, and one of the most damaging when it is done wrong. Understanding the difference — selective, purposeful cuts at the branch collar versus indiscriminate cutting or topping — helps you evaluate the work being done on your property and hire accordingly.
757 Tree Solutions provides professional tree pruning throughout Chesapeake, Virginia Beach, Suffolk, and Hampton Roads following ANSI A300 standards. If your trees need pruning or you want an assessment of what they need, call us for a free on-site evaluation.
