"Jonathan Ward" wrote in message
...
A lot of my trees and shrubs have lichen on them.This appears to be robust
enoough to stop buds (both flowe and leaf) developing in places. Is the
lichen
harming the plants or is it just adapting to other problems. For example
we
appear to have a lot of canker in the garden.

As far as I know, lichen doesn't get anything from the tree and IIRC it's
actually a symbiote of a fungus and something else. That;s why it grows fine
on gravestones and roofs etc. It's probably something else affecting your
trees.

Martin