Good pruning is selective. Each cut should have a reason: removing dead or broken wood, clearing a roof or driveway, correcting a weak structure, or letting in light. Bad pruning, particularly "topping," creates more problems than it solves.
Types of pruning
Deadwooding
Removing dead, dying and broken branches. It is the most common safety pruning and especially valuable over driveways, patios and play areas.
Clearance pruning
Raising the canopy over sidewalks and driveways, and pulling branches back from roofs, gutters and chimneys. Branches rubbing a roof damage shingles and give squirrels a ladder.
Structural pruning
On young and middle-aged trees, gradually favoring one dominant leader and well-spaced branches. This prevents the weak co-dominant forks that so often split in storms.
Crown thinning and reduction
Selectively removing some branches to reduce weight on long limbs or reduce height or spread, using proper reduction cuts back to a lateral branch.
Why topping is a mistake
Topping cuts large branches back to stubs. The tree responds with a mass of fast, weakly attached sprouts, while the stubs decay. A few years later the tree is just as tall, structurally weaker, and needs more work. If someone proposes topping your tree, get a second opinion.
Timing
Dead or hazardous wood can be removed any time. For many trees, late winter dormancy is a good time for structural pruning: the branch structure is easy to see and the tree is ready to seal wounds in spring. Some trees bleed sap when pruned in late winter; it looks dramatic but is generally not harmful. Flowering trees are often pruned right after bloom. Oaks deserve special care in areas affected by oak wilt, where pruning during the growing season can raise infection risk. Ask an arborist about timing for your species.
How much to take
Removing too much live canopy at once stresses a tree. A conservative approach, removing only what is needed, protects the tree's ability to feed itself. Expect a reputable crew to explain what they will remove and why.
Climbing spikes
Spikes (gaffs) wound the trunk and should not be used on trees being pruned and kept. Roanoke's city code even prohibits climbing irons on live trees for permitted work on city property. Professionals use ropes and lifts instead.
Trees near power lines
Do not prune branches near energized lines yourself or hire an unqualified crew for it. Contact the utility, which manages line clearance.
Timing pruning by species
For many trees, timing is flexible, but a few species have clear preferences. Virginia Cooperative Extension's deciduous pruning calendar favors dormant-season pruning for oaks, and Extension-affiliated guidance specifically recommends avoiding oak pruning from March through August to reduce the risk of oak wilt. Some trees, such as maples, bleed sap when pruned in late winter; the calendar notes this is more cosmetic than harmful. Flowering trees that bloom on old wood are often pruned right after bloom to avoid removing flower buds. Storm damage, of course, is pruned whenever it happens. Our ash and oak guide explains the oak wilt reasoning.
How often?
Mature shade trees near homes often benefit from a check every few years, with deadwood removal as needed. Young trees benefit from structural pruning early, which is quick and inexpensive and prevents defects that would be costly to correct later.
Pruning versus removal
If you are deciding between the two, see remove or trim?
Use our free quote form to schedule a pruning estimate.