Trees don't decline overnight — there are usually visible warning signs well before a tree becomes a hazard. Catching them early sometimes means the tree can be saved with pruning or treatment, rather than removed entirely.
Canopy and leaves
- Thinning canopy, or leaves that are smaller, sparser, or off-colour compared to previous years.
- Branches that leaf out later than the rest of the tree, or not at all — a sign of dieback.
- Leaves dropping outside of normal autumn timing.
Bark and trunk
- Bark that's cracking, peeling, or falling away in large sheets.
- Vertical cracks or seams running up the trunk.
- Oozing sap or dark staining, which can indicate infection or insect activity.
Fungus and growth at the base
Mushrooms or shelf-like fungus growing on the trunk or around the root flare are a strong indicator of internal decay — often more advanced than what's visible on the surface.
Root and soil signs
Soil that's heaved or cracked near the base, or roots that appear to be lifting, can signal the tree is losing its structural anchor — a serious safety concern, especially in high winds.
When in doubt, get it assessed
Some of these signs are more urgent than others, and it's not always obvious from the ground how serious the decay is. Our tree health assessments give you a clear, honest recommendation either way.