Comment Guidelines
We welcome your feedback on Houseandhome.com. H&H reserves the right to remove any unsuitable personal remarks made about the bloggers, hosts, homeowners and/or guests we feature. Please keep your comments focused on decorating, design, cooking and other lifestyle topics. Adopt a tone you would be willing to use in person and do not make slanderous remarks or use denigrating language. If you see a comment that you believe violates any of the guidelines outlined above, please click “Alert a Moderator.” Thank you.
OK

seriously tho, we inquired about copper nails and were told they may work but kill all the surround grass and plantings as well.....
I was going the more economical way as the chewer is about $ 100-150 per tree. If the tree is good mulch product, like cedar or pine ask him to leave it for you.
You can get a tree company to come and chew up the stump in the ground with a grinding thing they use (a VERY technical term, that ;-)). It would get most of the stump and the bigger roots near it, but not all the roots farther from the stump. my neighbour just had this done, and then planted another tree on top of the old one.
we had an old willow taken down and were left with a stump 3 feet in diameter. We drilled holes 12" ( about 10 holes) deep and filled with a killer we bought at a garden center. We kept topping it up every time the solution got lower in the holes. I do not remember the name. It worked but took 2 years. I have heard of people hammering copper nails in too and it worked. Maybe do both.