I built 3 pens this year using all cedar (12') that I cut off the farm, we put them in with a post driver. Don't know how long they will last. All are good red cedar with very little white on them. I built a vineyard 10+ years ago and all those post still look good. I did visit other farms and they had used cedar as well.
I have had white cedar post in for over 30 years in our deer pen.To get them to last you have to peel them first. Anything but cedar should be coated with creasote below ground.
When I bought this ranch they had cedar post in the ground but they were for low fence. They had been in the ground for over forty years and were still good. In fact the guy I bought the ranch from bought them when I pulled them out. I put in 2 7/8 inch steel pipe for the high fence as we would buy used well pipe from the oil line.
I use locust....some of the locust from our beef cattle fence have been in the ground for 20 years and still have not rotted. I would like to know how oak does when buried, my guess is not real well since it is alot more open grain, not tight grained like locust.
Was told white oak will last 10-20 years in well drained rocky soil around here was told that by a tree guy but want to know if anyone had used it before
I have had cedar post in the ground since back in the early 90's they are still all there. U will only have rot in the white part of post I recommend sawing down to the red if possible. My post in deer fence has been in ground for 3 yrs with concrete. We used mostly 8 to 10 inch post trimmed down to 6x6 were they go in ground use 2 1/2 inch staples. Go ahead and make h braces with 45 bracing coming down off of h braces and u won't pull them over with a Mack truck