Is My Tree Dead or Just Dormant?
Trees in Niagara go dormant when temperatures are consistently below 10°C, and they require sustained temperatures above roughly 10°C to break dormancy. Dormancy is normal. Death is not.
What’s Actually Happening
During dormancy, a tree slows its metabolic processes to conserve energy. No leaves, minimal sap movement, and brittle-looking branches can all be normal in winter.
A simple test:
- Flexible twigs that bend and reveal green tissue inside are typically alive.
- Twigs that snap easily and are brown and dry inside are usually dead.
Sudden leaf drop during the growing season — especially mid-summer when canopies should be full — is different and should be evaluated by an arborist.
Local Context (Niagara)
Niagara’s fluctuating spring temperatures can confuse homeowners. A warm week followed by frost can delay leaf-out.
Species like Silver Maple (Acer saccharinum) and Willow (Salix spp.) leaf out earlier than Oak (Quercus spp.) or Honey Locust (Gleditsia triacanthos).
How to Handle It
If buds are swelling and twigs show green tissue, wait.
If there is no bud activity by late spring and branches are brittle throughout the canopy, call for an assessment.
Bottom Line
Dormancy is seasonal. Lack of life signs well into spring is not.