[quote=Darylh;36611]Stone has always been a good choice but I have always been lery of the fact that how do you get the post stable and stay stable over the years, but make sure there is a couple of inches at the bottom of the hole before installing the post. Bring the stone to the top of the hole and do not let bare soil touch the post.
By the way one of the biggest reasons people have with rotten posts with concrete is 1- they do not put any gravel at the bottom of the post for water to drain away and 2- they do not allow the concrete to come up past ground level. I always cement them in now and have not had any issues yet.[/quote
Agreed, I should have elaborated more on the stone at the botttom of the hole, but I always envision the typical installation where someone throws two shovels of concrete in the hole, sticks the post in, then fills with concrete, thus forming a concrete boot around the wood.
If you use a smaller screen size of stone 3/4" or so, and pack it as you fill, it will hold the post ridgid, just like the concrete. All you are doing is increasing the diameter of the collar around the post to provide more surface area against lateral movement, it has nothing to do with "concrete" per say as most people believe.