A healthy tree is one of the best things you can have on your property. It adds shade, value, and character, and around Orillia and Simcoe County, mature trees are part of what makes a yard feel established.

But as much as a healthy, mature tree adds to your outdoor space, one in decline puts everything around it at risk. When a large tree fails, it can land on a roof, a vehicle, a power line, or a person, and it almost always happens at an inconvenient moment.

Thankfully, with most trees there are warning signs that can be seen before they fall. It’s rare for a tree to come down without showing signs first, and you can spot most of those signs from the ground once you know what to look for. 

In this article, we’ll go over how to check your trees and catch a problem before it turns into an emergency.

Start With Tree Inspections

Before anything else, walk a full circle around the tree and take a good look. You want a sense of its overall balance and shape.

A few things might jump out right away:

• Leaning. A gentle, long-standing lean is usually fine. A sudden new lean, especially one paired with soil heaving or cracked ground on the opposite side, is a serious red flag.

• Canopy thinning. Compare it to similar trees nearby. If yours has noticeably fewer leaves, bare patches, or branches without growth at the tips, the tree may be struggling.

• Deadwood. Large dead branches still attached to the canopy can drop on their own, and they often signal decline in the rest of the tree.

• Asymmetry. A canopy that’s heavy on one side puts uneven load on the trunk and roots, which matters a lot in high wind.

If something doesn’t seem right here, take a closer look at the trunk, the base, and the roots.

Warning Signs in the Trunk and Branches

The trunk tells you a lot about a tree’s health. Look slowly from the base up to the main branches and watch for these issues:

• Cracks and splits. Vertical cracks in the trunk, or deep splits where two large stems meet, are among the most dangerous defects a tree can have. A crack means the wood has already failed somewhere, and it never gets better on its own.

• Cavities and hollows. A hole or soft, decayed area in the trunk points to internal rot. Trees can survive with some hollowing, but a large cavity weakens the trunk’s ability to hold weight.

• Included bark. When two stems grow tightly together in a narrow V shape with bark pinched between them, that union is weak. These are common failure points in storms.

• Bark abnormalities. Missing bark, oozing sap, or areas where the bark looks sunken or discoloured can indicate disease or dead tissue underneath.

• Multiple trunks. Trees with several trunks from one base aren’t automatically dangerous, but they need close attention, because the connection points carry a lot of stress.

One small issue isn’t always a problem, but you should be concerned when you see several signs together, or when they appear on a large tree close to your house, driveway, or places where people gather.

Don’t Overlook Cracks

Cracks get their own section because homeowners often underestimate them. Not every crack is an emergency, but some types should never be ignored. Watch for the following:

• A crack that runs deep into the wood rather than just through the surface bark.

• Two or more cracks in the same area of the trunk.

• A crack combined with a cavity, a fungus, or a visible lean.

• Any crack at a branch union on a limb that overhangs something valuable.

If you can fit a finger into a crack, or if the two sides of it move independently when the wind blows, treat that as a tree that needs professional assessment soon. Cracks like these could mean the structure is already compromised, and the next big windstorm may be all it takes.

Down to the Roots

Roots anchor the whole tree, and most of them sit underground where you can’t see them. That makes root problems easy to miss and especially dangerous. Pay attention to the ground around the base:

• Heaving or lifting soil. If the soil on one side of the tree is mounded up or cracked, the root plate may be starting to pull free. This is one of the clearest signs a tree is close to uprooting.

• Exposed or severed roots. Construction, trenching, new driveways, and landscaping can cut major roots. Damage may not show in the canopy for a year or two, but the anchorage could be weakened.

• Fungus at the base. Mushrooms or conks (shelf fungi) growing on the roots or where the trunk meets the ground often indicate root rot, something you can’t see but which seriously reduces stability.

• Soil compaction or grade changes. Heavy equipment, paving, or piling soil against the trunk can suffocate roots over time.

Root problems are dangerous because a tree with a healthy-looking canopy can still tip over if its root system is ready to fail. If your property has had recent digging or construction near large trees, keep an eye on things.

Fungal SOS

Plenty of people see mushrooms on or near a tree and think nothing of it. Often, though, that growth is a sign of decay inside the wood. Here’s what to watch for:

• Conks or brackets (hard, shelf-like fungi growths) on the trunk usually mean decay is well established inside.

• Mushrooms at the base or over the root zone can point to root rot, which threatens the tree’s stability.

• Soft, crumbly, or discoloured wood under loose bark is a sign the tissue is breaking down.

Not every fungus means the tree is finished, and some grow only on dead wood. But fungus on a major living part of the tree is a reason to have it checked. By the time decay shows on the outside, it’s usually further along on the inside.

Storm Vulnerability in Cottage Country

Trees around Orillia, Lake Couchiching, and the broader Simcoe County and Kawartha Lakes region take a beating from wind, ice, and heavy snow. Storm conditions don’t create defects on their own, but they expose the ones that are already there. Some trees are more vulnerable than others.

Pay attention to:

• Trees with any of the trunk, crack, root, or fungus issues listed above.

• Tall trees that stand alone, since they catch more wind than trees protected within a stand.

• Trees that have recently lost neighbours to removal or clearing, because they grew up sheltered and aren’t conditioned to take full wind on their own.

• Trees with dense, unpruned canopies that act like a sail.

• Species that hold their leaves late or have brittle wood, which load up with ice and snow.

Around the lakes, waterfront trees need extra attention. They often take wind straight off open water, and the soil near shorelines can be looser. If you have large trees leaning over a cottage, a bunkie, or a dock, have them checked before storm season instead of after.

Important Insurance Concerns

Trees and insurance can get complicated, so it helps to know the basics before something happens. Keep in mind:

• Negligence matters. If a tree falls and there’s evidence it was visibly dead, diseased, or hazardous beforehand, an insurer may argue the damage was preventable. Documented inaction can affect a claim.

• Keep records. If you notice warning signs, photograph them and keep any assessment or quote from a professional. A paper trail showing you acted responsibly protects you.

• Know your policy. Coverage for tree removal and resulting damage varies, and a healthy tree that falls in a storm is often treated differently than one that was already failing.

• Neighbouring trees. If a clearly hazardous tree on your property threatens a neighbour, addressing it early can save you a dispute later.

None of this is legal or insurance advice, and your own policy and provider have the final say. The point is that catching a problem early protects your property and your position if you ever have to file a claim.

When in Doubt, Hire an Expert

A lot of tree assessment comes down to judgment that’s hard to build without training. A defect that looks minor from the ground can be serious up close, and a tree that worries you might be perfectly sound. A certified arborist can tell the difference.

If you’ve spotted any of these signs, or you’ve just got a big tree near the house that’s never been checked, we recommend getting a professional to look at it. Our ISA-certified arborists serve Orillia, Oro-Medonte, Ramara, Severn, Springwater, and the Kawartha Lakes, and we can tell you whether a tree needs removal, some corrective pruning, or just monitoring.

Don’t wait for a storm to make the decision for you. If a tree on your property has you concerned, call Woodland Tree Service and we’ll help you figure out the safest path forward.