The Best Time to Trim & Prune Trees in Michigan

Ask ten neighbors when to trim their trees and you'll get ten different answers. For Michigan, most of them are wrong. Timing matters more than people expect — prune at the wrong time of year and you can invite disease, stress the tree, or waste a whole season of growth.

Here's how we think about pruning timing after years of working on trees across Mid-Michigan.

The short answer: late winter, while trees are dormant

For most trees in our area, the best time to prune is late winter — roughly February into early March — while the tree is still dormant.

The wood is bare. The sap hasn't started running hard yet. And the insects and fungi that spread tree disease are still shut down for the cold. Cut now and the tree wakes up in spring ready to seal the wound and push new growth.

That's the general rule. But Michigan has a few species that break it, and getting those wrong is expensive.

Why dormant-season pruning wins here

Cleaner cuts, faster healing

A dormant tree isn't spending energy on leaves and shoots, so it has reserves ready for spring. When the weather warms, it closes pruning wounds quickly. Fast sealing means less chance for decay or pests to move in.

You can actually see the structure

With the leaves down, we can read the whole canopy — crossing limbs, weak V-shaped crotches, deadwood, and branches growing back toward the trunk. It's far easier to make smart structural cuts when you're not fighting a wall of foliage. That's a big reason we schedule a lot of our tree trimming and pruning work in the cold months.

Less stress on the tree

Summer pruning removes leaves the tree is actively using to feed itself. Take too much in the heat and you can stress it right when it's working hardest. Dormant pruning avoids that hit.

The one rule you can't break: oaks

If you have red oak, white oak, or any oak on your property, mark this down: prune oaks only from November through March.

Michigan has oak wilt, a fungal disease that kills trees fast — sometimes in a single season for red oaks. It spreads two ways: underground through connected roots, and above ground by tiny sap beetles drawn to fresh wounds in the warm months.

Cut an oak from April through October and you've basically rung the dinner bell. A beetle carrying oak wilt spores lands on that fresh cut and infects the tree. We've seen healthy oaks lost because someone trimmed a low branch in June.

So we keep oak work in the dormant window. If an oak is storm-damaged in summer and simply has to be cut, the wound should be treated right away — that's a judgment call worth a quick phone call before anyone touches it.

Ash trees and emerald ash borer

If you still have a living ash tree, it's a survivor. Emerald ash borer has killed most of the ash across Mid-Michigan.

Watch for the signs: canopy thinning from the top down, D-shaped exit holes in the bark, and heavy woodpecker activity stripping the bark to get at the larvae. Pruning won't cure an infested ash, but a knowledgeable eye can tell you whether the tree is treatable or whether it's time to plan removal before it gets brittle and dangerous. If you're worried about an ash, our tree disease and pest treatment crew can take a look.

Season by season in Michigan

Late winter (February–March) — the sweet spot

Best window for most species. Structure is visible, disease pressure is low, and the tree heals fast in spring. This is when we do most major pruning and crown reduction and thinning.

Spring — ease off

Once buds break and leaves flush, hold off on big cuts. The tree is spending stored energy, and fresh wounds are more attractive to pests — including oak wilt beetles. Light touch-ups are fine. Save the real work.

Summer — light work only

Summer is fine for small stuff: removing clearly dead wood, clearing a branch off the roofline, taking out a broken limb after a storm. Just keep oaks off the list unless it's an emergency, and avoid heavy thinning in a drought or a heat wave.

Fall — the worst time for big cuts

This surprises people. Fall feels like cleanup season, but it's the riskiest time for major pruning. Decay fungi are releasing spores, and wounds seal slowly heading into winter. We generally avoid large fall cuts unless there's a safety reason.

When timing takes a back seat

Season matters — but safety always wins. Some cuts can't wait for February:

• A cracked or hanging limb over the driveway, roof, or where kids play
• Storm damage
• A branch touching the power line
• Clearly dead wood that could drop

If a limb is a hazard, take it down now. A dead branch doesn't care what month it is, and neither does gravity.

Every tree — and every yard — is a little different

Species, age, health, and what you're trying to accomplish all change the plan. A young maple you're training for good structure gets pruned differently than a mature white pine or a storm-battered silver maple.

That's why we come out and look before we quote. Estimates are free and there's no obligation. Whether your place is in Lansing, Okemos, or one of the smaller towns around the Capital region, we're happy to walk the property with you and tell you straight what your trees need — and when.

Ready to get your trees on the right schedule?

Whether it's a single oak that needs a careful winter trim or a whole yard due for a cleanup, we'll come out, take a look, and give you an honest plan. Hayworth Tree Service is family-owned, licensed and insured, and we know Michigan trees because we live with them too. Call us at (208) 635-2100 for a free, no-obligation estimate.