5 Signs Your Tree Needs to Be Removed

No one wants to lose a mature tree from their yard. A large, healthy tree provides shade, increases property value, and adds character to your home. But there are situations where removal is the responsible choice, both for your safety and the health of your surrounding landscape. Here are five signs it may be time to call in a professional.

1. Large Dead Branches in the Crown

A few small dead twigs are normal, especially after a harsh Calgary winter. But large dead branches, sometimes called widow-makers, are a serious hazard. If more than 25 to 30 percent of the canopy is dead, the tree is in significant decline. Dead branches are unpredictable. They can fall in calm weather, not just during storms, and they do not give warning.

Check for branches that have no leaves during summer, bark that is falling off to reveal smooth or brittle wood underneath, and branches that snap easily when touched. A single large dead limb over a play area or walkway is enough to warrant an immediate assessment.

2. Trunk Decay and Cavities

The trunk is the structural backbone of the tree. When it starts to decay internally, the tree loses the strength it needs to stay standing. Signs of trunk decay include large cavities or hollow sections, soft spongy wood, mushrooms or fungal conks growing from the bark, and areas where bark is missing with no sign of healing.

A tree can survive with some internal decay, but it depends on how much sound wood remains. An arborist can assess the ratio of sound wood to decayed wood and determine if the trunk is still structurally viable. In many cases, once decay reaches a certain point, no amount of pruning or treatment can restore the tree's integrity.

3. The Tree Is Leaning Suddenly

Many trees grow with a natural lean and that is perfectly fine. What is concerning is a tree that has started leaning recently, especially after a windstorm or heavy rain. A sudden lean often means the root system is failing. Look at the base of the tree on the side it is leaning away from. If you see cracked or heaving soil, exposed roots, or a gap between the ground and the trunk base, the root plate may be compromised.

A tree with a failing root system can topple without much warning, potentially landing on your home, garage, fence, or vehicle. This is one of the most urgent situations for removal.

4. Root Damage from Construction or Grade Changes

If your property has recently had work done, such as a new driveway, a garage pad, a fence line, or even a new sidewalk, the tree's root zone may have been damaged. Cutting or compacting roots within the critical root zone, typically the area under the tree's canopy and beyond, can destabilize the tree and starve it of water and nutrients.

Symptoms may not appear for a year or two. Watch for reduced leaf size, early fall colour, thinning canopy, or branch dieback starting at the top. By the time these signs show up, the damage is often irreversible.

5. The Tree Is in the Wrong Location

Sometimes a perfectly healthy tree simply needs to go because of where it is. A tree growing too close to your foundation can cause structural issues. A tree that has grown into overhead power lines is a persistent safety and liability concern. A large poplar with aggressive roots near your sewer line may be causing expensive plumbing problems year after year.

In these situations, removal is not about the tree being unhealthy but about the practical realities of the site. Replacing it with a more appropriately sized species in a better location is often the best long-term solution.

What to Do Next

If any of these signs apply to a tree on your property, do not attempt to remove it yourself. Tree removal, especially for large or structurally compromised trees, requires specialized equipment, training, and insurance. A certified arborist can assess the tree, confirm whether removal is necessary, advise you on any City of Calgary permit requirements, and carry out the work safely.