"Jaques d'Alltrades" wrote in message
...
The message
from Iain Douglas contains these words:

I've an oak tree about 25' tall growning at the side of my
garden. I want to raise the level of the garden about 18" on that side.
Will the oak survive if I cover the lower 18" of bark or do I need to
protect it ?

You shouldn't earth-up the bole of an oak tree or it will probably get
disease in. (Theoretically, you shouldn't earth-up any tree, but some
don't mind too much: willows especially.)
Rusty

There are several trees in a nearby park that have been earthed up and are dint
really well. I'm not sure what they are thought.

Jenny