In article ,
Charlie Pridham wrote:


I can confirm that building soil level around trees kills them and quite
quickly, I raised the level of the bottom of my garden by 3' and an existing
sweet chestnut died within a season, while all the shrubs loved being
buried.

Yes, but doing so over most of the root area of a tree is a far cry
from just putting a heap there, and 3' is a far cry from 4" (which
someone else mentioned).


Regards,
Nick Maclaren.