I have about 70 plant growing in a tent configuration with a center cable at 12 or 14 feet high. I am hoping to expand next year, and need to source longer posts. My Cascade and Chinook plants make the top of the wire by the second week of June or so. Currently I am using the longest pressure treated 4x4's I can get locally (16-18') depending on the year. Is there a better post to use? What are other people using? I did a bit of looking at a commercial hop hard in North Western Michigan yesterday, and noticed that they are using what looked to me like peeled cedar posts with about 20' above ground. Does anyone know where to start looking for something like this?