In article , "H" writes:
| in a neighbouring garden. Having pruned said conifers to 7ft high I
| followed advice to hammer pure copper nails into the tops of the trunks
|
| Maybe you should have hammered nails into just half of them .. and see if
| there was a difference 6 months later.

Especially considering that leylandii (like almost all conifers)
don't resprout at all well from old wood :-)


Regards,
Nick Maclaren.