Ash die back disease (ADD) is caused by the fungus Hymenoscyphus fraxineus. Across Norfolk our ash trees are suffering and many are not surviving beyond four years after infection, sadly many need to be felled. The wood becomes brittle and the tree can break apart making it incredibly dangerous, not only to people but their property. This photo is of an ash tree that sadly needed to be felled. There is hope though, some mature ash trees have been observed to recover and live on after infection. These trees that survive the infection will be the future ash tree of our local landscape. We can identify infection markers on your ash trees and able to routinely monitor for signs of recovery or decay.
Ash trees are often the last of the native trees to come into leaf, but they should be in full leaf by late Spring. If you notice your ash tree has thinned out, has deadwood in the canopy or you can see a lot of sky through the tree as you look up, your tree might have ash die back.