Preparing the holes
Installing Concrete Fence Posts
When installing concreting fence posts into the ground the posts should be buried a minimum of 600mm deep the recommended depth for a 1.80m or 6 foot high fence is 760mm or two foot six inches. Concrete fence posts can be installed with either a mixture of ballast and cement or Post 10.
Installing Wooden Fence Post
Dig post hole so diameter of the hole is 3 times the width of the post (i.e., the hole for a 4” wood post should be about 12 inches wide). The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).