Why Is My Tree Dying in London, Ontario? (Signs & Solutions)
- Mark Potane
- Dec 31, 2025
- 2 min read
Is your maple shedding leaves in July? Do you see D-shaped holes in your ash tree? In London, St. Thomas, and Exeter, these aren't just quirks they are red flags. Whether it’s the Emerald Ash Borer or lingering damage from a Southwestern Ontario ice storm, catching the problem early is the only way to save your tree (and your wallet).
Why Trees Fail in Middlesex County: Top Local Causes

Trees in Southwestern Ontario fight a tough battle against our humid summers and freezing winters. These are the four most common enemies of local landscapes:
The Emerald Ash Borer (EAB): This invasive beetle is decimating ash trees across the province. If the canopy is thinning and the bark has tiny D-shaped exit holes, the tree is likely infested.
Hidden Storm Damage: London’s notorious ice storms leave behind "shakes" vertical cracks in the wood. These fractures often go unnoticed until a heavy branch fails months later.
Fungal Disease: We frequently treat Tar Spot on maples and Black Knot on fruit trees. While some fungi are just ugly, others like root rot silently destroy the tree’s stability.
Soil Compaction: Construction equipment crushes root systems. If you live in a new development, your tree might be slowly suffocating from damage done years ago.
Signs You Need a Certified Arborist ASAP
Don't wait for a branch to fall. Call a professional immediately if you see:
Deep vertical cracks in the trunk.
Mushrooms growing at the base (a clear sign of internal root rot).
Limbs hanging over your roof, driveway, or power lines.
At Out on a Limb Tree Experts, we don't just cut trees down; we diagnose them. Whether you need a safety assessment or a full removal, we have the heavy equipment to do it without wrecking your lawn.
Not sure if it’s time to cut it down? Call us at +1 519-719-3607 for an honest, expert opinion.
Local Cost Guide: Tree Removal in London & St. Thomas
Price varies by risk and size, but here is what homeowners in London and Middlesex County typically pay:
Tree Size | Height | Estimated Cost |
Small | Under 30 ft | $250 – $550 |
Medium | 30 – 60 ft | $600 – $1,200 |
Large/Hazardous | Over 60 ft | $1,500+ |
> Pro Tip: Complex jobs involving power lines, limited access, or bucket trucks will affect the final quote.
Stop worrying about that leaning tree. Visit our Tree Services Page to see our full range of options, or reach out today to secure your property.




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