Posted: 09/07/2017 at 15:18
Most trees will suffer if you bury the base of the trunk and roots under more than a couple of inches of soil. The trunk can easily rot at the base but the main problem is that there are roots surprisingly close to the surface and those need air which will be cut off when buried. Have a look at this pdf from some experts:
You may get away with it in some cases - depending on what type of palm it is, that may survive. Can you post some photos to try and identify your trees?
Last edited: 09 July 2017 15:18:28