Don't prune oak trees until later in the fall to prevent oak wilt disease: Invasive Species Centre - Turf & Rec

Don't prune oak trees until later in the fall to prevent oak wilt disease: Invasive Species Centre - Turf & Rec

Sap beetles carry fungus, spreading it other trees

What to Prune Now

Spring is in full swing; days are longer, birds are singing and you may have started thinking about pruning your garden. It’s best to prune most deciduous trees or shrubs before their leaves emerge, so if your trees and shrubs already have leaves, wait until after the leaves drop in fall. Pruning trees and shrubs before they leaf out keeps them healthier. Here’s how: A few exceptions to… Source