Is My Tree Dead? How To Tell

The short version

Scratch test. Scrape a little bark off a thin twig with a thumbnail or pocket knife. Moist and green underneath means that part is alive. Brown and dry means it is dead at that point. Try several branches at different heights and on different sides, because one dead twig tells you very little.

Bud check. In the dormant season, living twigs carry plump, firm buds. Dead ones have shrivelled buds or none, and snap cleanly instead of bending.

Leaf-out. In spring, a healthy tree leafs out across the whole crown. Leaves only on the lower half, or only on one side, is a tree in trouble.

If most of the crown fails those checks, the tree is dead or close to it. If only one limb fails, you have a dead limb on a living tree, which is a pruning job, not a removal.

The signs a tree is dying, not just having a bad year

A thinning crown, year after year. More sky through the canopy each summer, smaller leaves, and dead branch tips spreading inward. One rough season after a drought is normal. Three in a row is a trend.

Bark coming off in sheets. Bark that falls away and leaves bare, smooth wood underneath means the living layer beneath it has died in that area.

Fungus at the base or on the trunk. Mushrooms around the root flare, or shelf-like brackets on the trunk, usually mean decay inside. What you see on the outside is the fruiting body; the rot it came from is out of sight, and it is often further along than the outside suggests.

Cracks, splits and cavities, especially where two main stems join. A seam running down from a fork is a failure point.

A new lean, or the ground lifting. A tree that has always leaned is one thing. A tree that has started leaning, with soil cracked or heaved on the far side, has root trouble and should be looked at soon.

Heavy sprouting from the base or trunk. Masses of new shoots from the root flare or along the trunk are often a stressed tree trying to replace a failing crown.

Things that look like dying but usually are not

Evergreens dropping inner needles in autumn. White Cedar, Pine and others shed their oldest interior foliage every fall. If the outer growth is green, this is normal.

Late leaf-out. Oak, Honey Locust and Catalpa all leaf out noticeably later than Maple. Give them until late spring before deciding anything.

Leaf scorch in a dry August. Brown, crispy leaf edges in late summer after a dry spell is water stress. It matters if it happens every year, but one summer of it is not a death sentence.

Blue Spruce losing its lower branches. Very common around here, usually a needle disease or canker working up from the bottom, and it does not mean the whole tree is about to go. It does mean it will not grow those branches back.

Ash: assume the worst

If the tree is an Ash, the likeliest explanation for a thinning crown in Durham Region is Emerald Ash Borer, and an infested Ash rarely comes back. Dead Ash also becomes brittle unusually quickly, which makes it a different job from any other dead tree. Our dead Ash guide covers how to tell, and what to do about it.

Why a dead tree should not wait long

A living tree bends. Dead wood dries out, loses its strength and becomes unpredictable, and a dead tree gets more dangerous to take down the longer it stands, because the wood a climber would normally rely on can no longer be trusted. That changes how the job has to be done, and it is the main reason we would rather deal with a dead tree this season than next.

How urgent yours is depends mostly on what it could land on. A dead tree at the back of a large lot is a planned job. One over the house, the driveway, a play area, a neighbour's roof or a power line is not. If it is already cracked, hanging or leaning onto something, treat it as an emergency.

Permits and neighbours

On a normal residential lot, removing a dead tree usually needs no permit, but that depends on where you are and whether the tree is part of a woodland, and a tree whose trunk sits on the property line belongs to both neighbours. Our permit guide for Durham Region sets out when you need to check first.

What to do now

Take a few photos: the whole tree from a distance, the base, and anything that worries you up close. Note what it would hit if it came down. Then send us the photos or call, and we will tell you straight whether it is dead, whether it is a removal or just a dead limb to prune out, and how soon it needs doing.