I don't think they have the lifespan of being in the ground that a mountain juniper does. Here they call mountain juniper "cedar posts". Good fencing stuff!
There are some cedar corner posts here on my farm that have been in the ground for at least 60 years. I know because I remember my grandfather setting them. The redder the cedar, the longer it lasts.
I think we have too much moisture here.
Even the standard green T-posts rust like hell here. People have gone to using galvanized T-posts and pressure treated wood posts, mostly. Seen lots of the treated posts rotted out. Galvanized gaucho type wire last longer too.
I have a stretch of fence that needs rebuilt at the ranch here that used cedar posts and standard barb wire. It's in shambles. While not great, it did it's job if I replaced the rotted posts with T-posts as needed... Until my bull and the neighbor's bull decided to spar through the fence last week.
Damn them anyway. They always wait 'til summer to do that...
