[Plantoid]

ive heard that a copper nail will kill a tree, does this work?
ive a load of laurel hedging that  needs to come down, if i copper nailed it all, and left it for a year would that be feasible?

 It never worked on our old apple  or leylandi trees .. a chain saw did . 
 
Laurel is a " boogerooter "  to get rid of as it is evergreen and very whippy .
Cutting it off at ground level and SBK treating the roots is the only way I know of getting rid of it then a year later use a TIRFOR winch or a tractor &  chain to pull the  dam things stumps out one by one.or spend ages trying to dig and cut them out the ground.
Any live stumps will quickly grow back as bushes to about five feet in three years 

[knight_family]

Sorry to say Copper nails is a bit of a myth. It will kill the tree but the amount of copper nails you will need for 1 tree will bring all the scrap metal men round!!!

Best to cut them down sorry.