Starting with your corners, add 3 or 4 inches of gravel to the bottom of each hole, place your post in and get it straight, square and at the correct height. A post leveller is really handy at this point.
Carefully holding your post in place, pour in instant concrete until the hole is 2/3 full. Add water to the top and use a stirring stick to mix the cement. You might need to use some temporary boards to hold it in place until it dries, and then top the hole up with dirt.
Once you have your corner posts up, use a builder’s or mason’s line along the top to help you keep all the others at the right height.
Once all posts are in place, fencing clips are the easiest option to attach the panels for timber posts. It also means you can take the panel out easily and replace it if needed. Concrete posts usually have the slots built in,
You’ll need to keep the fence panels about 50mm off the ground to prevent them rotting, and the easiest way is to fit a gravel board beneath each panel.
Post caps will also preserve the life of the posts, by preventing water from soaking down into the grain of the wood from the exposed top.
And you’re done!
Now, to finish it off, look to soften hard lines with plants, paint and wildlife hotels!