Tree Trimming Services: Best Practices for Stronger and Healthier Trees

 Most people trim trees when they start looking overgrown. That's understandable, but the problem with this approach is that by the time a tree looks overgrown, the window for proper maintenance has already passed. Tree trimming services done well aren't reactive, but they are a maintenance practice that keeps trees structurally sound, reduces risk, and extends their lifespan well beyond what a neglected tree typically achieves.

Here's what proper trimming actually involves, and where most property owners go wrong.

Timing Matters More Than Most People Realize

Late winter, just before the new growth emerges in spring, is the optimum time to prune for most species of trees. The cuts appear to heal up faster during dormancy as the tree is in a pause mode, and once the tree starts growing again, the cuts heal faster; plus, no leaves are hanging around so the branch pattern can be viewed more clearly. That will also help you determine which limbs you must leave behind, and which ones you can't.

But summer pruning is not always bad; it must have a purpose. If dead or damaged wood is on the tree, damaged limbs that are rubbing against a structure, or crown weight reduction prior to storm season are all acceptable reasons for pruning outside of dormant season. Cutting in summer when the tree is growing most is the worst time because it is under the most stress.

The Cuts That Actually Damage Trees

Bad pruning cuts are permanent. A flush cut — removing a branch so close to the trunk that the branch collar gets removed with it — eliminates the tree's ability to close the wound properly. What's left is an open entry point for decay and disease that the tree can't seal off. The correct cut leaves the branch collar intact and angles slightly away from the trunk so water runs away from the wound rather than sitting in it.

Topping — cutting the main leader or reducing the crown to large stubs — is one of the most damaging things done to trees under the name of tree trimming services. It creates multiple weakly attached shoots that grow back faster and with worse structure than before, leaves large wounds that rarely close properly, and shortens the life of the tree considerably. A properly trained arborist won't recommend it.

What Proper Tree Trimming Services Actually Remove

The goal of structural pruning isn't to reduce the tree's size arbitrarily — it's to remove specific wood that's working against the tree's health and stability. That means dead, dying, and diseased branches first. Then crossing or rubbing branches that create wound points where they contact each other. Co-dominant stems — two leaders competing for dominance — should be addressed early in a tree's life before the attachment point between them becomes a structural liability.

Crown thinning, done selectively and not excessively, improves airflow through the canopy, reduces wind resistance, and lets light reach interior branches that would otherwise die back from shading.

How Often Trimming Should Happen

For most mature trees, tree trimming services Des Moines arborists typically recommend a proper structural assessment and trim every three to five years, with annual checks for dead wood or storm damage. Young trees benefit from more frequent formative pruning in the early years — the decisions made when a tree is young determine its structure for the next several decades.

Skipping cycles doesn't save money. It lets small structural problems grow into large ones, and large structural problems in mature trees are expensive to correct — if they can be corrected at all.

The Bottom Line

Tree trimming is one of the highest-return investments a property owner can make in the trees on their land. Done correctly, at the right time, with the right cuts — it builds stronger structure, reduces hazard risk, and keeps trees healthy through decades of Iowa's seasonal extremes. Done wrong, it creates the problems it was supposed to prevent.