On Mon, 27 Feb 2012 08:35:57 -0000, Brian Gaff wrote:

The old creosote was pretty good but these days you seem not to be able
to get it.

I think you can but not retail. An agricultural suppliers would be
the place to look.

Wooden post rot at/just above ground level, in the "goldie locks"
zone for timber rotting fungus/bacteria. In the ground is generally
too wet, 6" above the ground generally too dry, oxygen levels also
affect things.

Decent pressure treated timber should last reasonably well or *dry*
timber where the entire bottom end to 6" above the ground level has
been stood in a container of quality wood preservative for the best
part of a week. And the rest of the post liberally brushed with
presetvative, several times.

--
Cheers
Dave.