Hi,

I live in Cambridge, MA and wanted to install a garden bed low fence with horizontal cedar boards at a height of  2-3 feet  and wanted to find the minimum  depth the fence post needs to be. I have also heard about wrapping pressure treated wood in plastic to avoid frost heave.  The beginning of the fence will but up perpendicular against the foundation wall and am concerned about digging near it to place the initial fence post.  In addition I was hoping to space out the posts 10 feet and attach some support board to the horizontal cedar boards halfway between the posts (5 feet) to keep them from sagging. Any thoughts would be appreciated.