Don't know about the nails, but we had to stop the root growth from breaking up
the blacktop of our driveway. We removed the dirt on the affected side, down to
expose the roots and chopped them all with an axe. The trees are huge Scotch
Pines and it hasn't affected them at all.
Sue in Mi. (zone 5)
"Not only is a copper nail not only not going to kill the tree, but it
is a primary components of many fungicides." [Western Chapter
International Society of Arboriculture]
Trenching around the house and cutting off roots approaching the house
is the best option.
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A copper nail may not kill the tree, but copper in sufficient quantity is
toxic to most plants. Copper is often used in nursery containers for trees
to kill off root shoots to prevent girdling. Copper sulphate injections are
sometimes used to kill invasive roots, in much the same manner the OP wishes
to achieve. I would do some research on proper quantities before attempting
this solution, however, to prevent killing off the entire plant.
pam - gardengal
Thanx for all replies....
I have been reading up on this, and copper sulfate is used to flush down
toilets to dissuade roots penetrating cracked sewer pipes, and to kill roots
The corpses of these killed roots are meant to rot away
after the treatment, though the copper may supress this since bacteria and
fungi are plants too.
I must check out the copper-injection process because
this might be done in a root far from the parent tree.
The tree in question is deciduous (possibly an Elm)
which shows vigorous growth every spring.
not sure what you may have over there but over here there is a product
called root barrier it is like rubber sheeting that the roots can't
penetrate. you can instal it yourself by digging a trench (hard yakka
doing all that digging) or have someone install it. can't see just
simply chopping the roots being a long term arrangement as like tree
branches that get pruned other roots will grow back and continue
'it works for me it could work for you,'
Thank you for the replies.
My house is in town and the city council is supposed to trench around the
house and put down a concrete barrier. They did this at the front of the
house, because it was evident that the veranda was lifting, but they will
not do it at the side (the house is on a corner) because there "is no
evidence of any damage"! When I explain about preventive maintenance they
say their budget doesn't cover this. I think I will try the copper nail
route because I can access the tree root(s) via a deep drill hole in the
footpath. I wonder how long it takes to work?
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