Question 1

How often do trees need to be trimmed?

Accepted Answer

It depends on the species, age, and purpose of the trim. Most mature shade trees — maple, oak, ash — benefit from a professional prune every 3–5 years to remove dead wood and address structural issues. Young trees may need annual formative pruning in their first 5–10 years to establish good branch architecture. Fruit trees and flowering ornamentals often require annual attention. Fast-growing species like Manitoba maple and silver maple may need more frequent attention as they produce weak growth quickly.

Question 2

What is the best time of year to trim trees in Ontario?

Accepted Answer

Late winter (February–March) is ideal for most deciduous trees. The tree is dormant, the branch structure is fully visible without leaves, and cuts close more quickly when spring growth begins. Summer pruning is also effective for hazard reduction and shaping — you can see the canopy clearly and assess for rubbing or crossing branches. Avoid heavy pruning in late fall: trees are beginning to go dormant and wounds may not close before winter. For oaks specifically, avoid pruning between April and July to reduce the risk of Oak Wilt, which spreads through fresh wounds during that period.

Question 3

What is tree topping, and should I avoid it?

Accepted Answer

Tree topping is the practice of cutting main branches back to stubs — essentially removing most of the canopy. It is widely condemned by arborists and tree care organizations because it causes significant long-term harm: the resulting vigorous regrowth is weakly attached to the stubs and more likely to fail in storms; the large wounds invite decay; and the tree's structure becomes increasingly dangerous over time. A reputable arborist will never top a tree. If a tree has outgrown its space, proper crown reduction — making cuts back to lateral branches — can achieve size reduction without the damage that topping causes.

Question 4

Can I trim a tree that is near power lines?

Accepted Answer

Trimming trees that are in contact with or growing into power distribution lines is regulated in Ontario. Homeowners should not attempt this themselves. The utility company — Kingston Hydro within city limits, Hydro One in rural areas — is responsible for maintaining clearance around their lines and typically does this at no cost to the property owner. For trees growing near (but not in) utility lines, a qualified arborist can trim branches on the property side of the lines, but will not work within the utility easement without utility involvement.

Question 5

What is the difference between trimming and pruning?

Accepted Answer

The terms are often used interchangeably, but technically: trimming typically refers to shaping work done primarily for aesthetics — keeping hedges, shrubs, or decorative trees looking tidy. Pruning is a broader term that describes cuts made for the health and structure of the tree — removing dead, diseased, or crossing branches, improving airflow through the canopy, or reducing risk from overextended limbs. Most work done on mature shade trees in Kingston yards is better described as pruning.

Question 6

What does proper tree pruning cost in Kingston?

Accepted Answer

Pruning costs depend on tree size, access, how much work is needed, and the number of trees. A single mature shade tree might run $200–$600 for a full prune. Large trees or those requiring a bucket truck or extensive rigging can cost more. Pruning several trees in one visit is more cost-effective than separate trips. Request quotes from at least two local Kingston arborists — prices can vary significantly, and the cheapest isn't always the best choice for a job that directly affects the long-term health of your trees.

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