Harry Krause wrote:


How deep did you bury the sonotubes? I need to dig holes for two larger
ones for a couple of 4x4 posts I want to "affix" to mother earth. I
wonder if I need 8" or 12" sonotubes?

Did you sit them on gravel before pouring in the sakcrete?

Just 3 feet...3.5 would have been ideal here re frostline.
Sure gets hard to dig much deaper than 3 feet if you're using a pointy
end dirt shovel.
We used 8" sonotubes.
Just after setting the sonotubes down into hole and checking alignment
of post along property line...we removed the post and dropped one
shovelfull of gravel into the sonotube, replaced & re-aligned post and
carefully shoveled the concrete mix into the tube. That should keep the
post end off the ground.