ORIGINAL: toddr96
Killing the tree isn't too big of a problem unless you aren't removing the spikes each year. The poisoning of the tree from the leaching of the metal takes around 4-5 years to begin the process, and it will kill the tree shortly thereafter, so I never leave them in for more than the month of archery season.
This is not accurate.
I have seen 100 year old trees that had metal in them, and they were nottaken down because they were dead. Most trees will grow aroundforeign objects, given the time, with no ill effects.Oh yea, I'm an arborist of 27 years.
