Posts How Can I Put A Row Of 5' Round Posts Into The Ground As Close As Possible And Keeping Them Parallel?

How can I put a row of 5' round posts into the ground as close as possible and keeping them parallel? - posts

I try to use a "wall" made of wood poles at a cliff of clay soil in a garden feature. I hope that you will act as a clay gamion keep falling in the lower terrace, where our seats are available. However, try to keep is 5 'position not only straight and vertical, but as close as possible, so that almost touch detection very difficult. The poles are 5 'and should be at least 1.5 meters in the ground. I will try to set the number 1, leave a message wide and then placed in the No. 3 spot, etc., and then reach the final again and put in the "disappearance" of positions in the hope that they are all parallel. However, suggestions are welcome!