Pruning Is All About Timing

One of the most common questions we get from homeowners is simple: "When should I prune my trees?" And the honest answer is — it depends. The species, the tree's health, what you're trying to accomplish, and even the time of year all play into the decision.

Our team has been pruning trees across Grand Rapids and West Michigan since 2011. The general guidelines we share here are based on ISA and ANSI A300 pruning standards — but every tree is different, and every situation deserves an individual assessment.

Late Winter to Early Spring: The General Sweet Spot

For most deciduous trees in Michigan, the general recommendation is to prune during late dormancy — roughly late February through early April, before the new growth flush begins. There are a few reasons this tends to work well:

  • Visibility. Without leaves, the branch structure is fully exposed. Our arborists can see crossing limbs, dead wood, and structural defects much more clearly.
  • Reduced disease risk. Many fungal pathogens and boring insects are inactive during cold months. Pruning wounds have time to begin compartmentalizing before spring pest activity ramps up.
  • Energy reserves. The tree hasn't yet invested its stored energy into new leaf production. Removing branches now means less wasted energy overall.

This is especially true for oaks. In Michigan, we avoid pruning oaks from April through July because of oak wilt — a devastating fungal disease spread by sap-feeding beetles that are most active during that window. If you have oaks on your property, dormant-season pruning isn't just preferred — it's important.

Summer Pruning Has Its Place

Summer pruning — after the spring growth flush has hardened off — can be appropriate in certain situations. It tends to have a mildly dwarfing effect, which can be useful if you're trying to slow growth in a particular direction or manage a tree's size.

It's also the easiest time to identify dead branches. If everything around it is green and leafy, the dead wood stands out. We'll sometimes flag dead or declining branches during a summer assessment and then schedule the work accordingly.

Fruit trees are another case. Many apple and crabapple varieties benefit from some summer pruning to improve air circulation through the canopy, which can help reduce disease pressure.

When NOT to Prune

This is where we see the most mistakes. There are certain windows when pruning can increase the risk of problems:

  • During leaf-out (April–May). Trees are spending their stored energy to produce new leaves. Pruning during this energy-intensive period can stress the tree more than at other times. This is sometimes called the "worst time to prune" and generally speaking, it's best avoided for major pruning work.
  • During fall. Decay fungi tend to be more active and produce spores in autumn. Pruning wounds made in fall may have a harder time compartmentalizing before winter, potentially increasing the risk of decay. That said, removing a hazardous limb shouldn't wait for a calendar date — safety comes first.
  • Oaks, April–July. We mentioned this above, but it's worth repeating. The oak wilt risk in Michigan is real. We schedule oak pruning for the dormant season whenever possible.

Michigan Species: A Quick Reference

Here's a general timing guide for some of the most common trees we work with in the Grand Rapids area. Keep in mind that these are general recommendations — your specific tree may have different needs depending on its health, structure, and site conditions:

  • Maples (sugar, red, silver): Late summer through dormant season tends to work well. Pruning in late winter can cause heavy sap bleeding — it's cosmetically messy but generally doesn't harm the tree.
  • Oaks (red, white, bur): Dormant season only (November–March) to reduce oak wilt risk.
  • Ash: Dormant season is generally preferred. If your ash shows signs of emerald ash borer damage, the conversation may shift from pruning to treatment or removal.
  • Fruit trees (apple, pear, cherry): Late winter dormant pruning for structural work, with light summer pruning for shaping and airflow.
  • Evergreens (spruce, pine): Generally best pruned in late spring after new growth ("candles") have elongated but before they harden off. Avoid fall pruning.

What About Emergency Situations?

Broken branches, storm damage, or limbs threatening your roof don't wait for the "right" season. If a branch is a hazard, it needs to come down. Period. Our arborists make these judgment calls every week, and the risk of leaving a dangerous limb far outweighs any seasonal timing concern.

If you're in the Grand Rapids area and dealing with storm damage, we offer 24/7 emergency response — call 616-947-4050 any time.

The Bottom Line

Pruning is one of the best investments you can make in your trees' long-term health and structure. But timing, technique, and understanding the specific tree all matter. A bad pruning cut at the wrong time can set a tree back for years — or open the door to disease and decay.

When in doubt, call a certified arborist. There's a surprising amount of decision-making that goes into even a seemingly simple pruning job — which branches to remove, where exactly to make the cut, what to leave alone. That expertise makes a real difference in outcomes.

If you've got questions about a tree on your property — or you're not sure whether it's time to prune — reach out for a free estimate. We're happy to walk your property and give you an honest assessment.