Wood fence installation,

Fence PostsSet all wood fence posts with about 1/3 of their total length buried in the ground. This is especially important on corner posts and any posts that will carry heavy weight or withstand high wind pressure.
Use a regular post hole digger to dig the post holes. Dig the holes straight to the proper depth at each stake marker. You can anchor the posts more firmly by making the holes slightly larger at the bottom than at the top. Place a large stone or two shovels full of gravel in the bottom of each hole. This provides drainage to avoid excessive moisture at the base of each post. Use a wood preservative to treat the section of the post that will be underground. Allow the post to stand overnight in the preservative so it can become well-saturated.