It will probably survive but will not like this treatment. { Not that
you will hear it 'groaning' [sorry, but couldn't resist it]}
Far better to build a low wall of stones or turfs around the base at
about 1m clear so that the base of the trunk will be in a depression.
Over the years this will probably fill but will not be such a problem.
The natural soil level is always the best~ especially when
transplanting. [though I know this is not the present case]
Best Wishes.
"Iain Douglas" wrote in message
...
Hi,
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 ?


Iain

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