![]() Although many of these trees may cost less than a quarter apiece, the labor and overhead costs can be much higher. ![]() ![]() Secondary functions have to do with the growth rate of the tree.ĭeer, mice, voles, and other critters damage and destroy millions of newly planted trees each year. Primary functions are to promote tree health and improve survival. Some actually harm, even kill the trees they're supposed to protect. The problem arises from the fact that not all protectors perform these functions equally well. Many studies (not included here) and countless applications attest to their success in protecting trees from animals, stimulating growth, etc. The good that protectors do has been well established. Moreover, in many cases those who do the actual plantings do not return to the site to inspect the trees and are therefore not aware of the harm these protectors do. It is not true that all protectors and shelters provide equal protection.Īs a result of the lack of good, unbiased data, most tree planters are oblivious of the harm being done to their trees. Nonetheless, it is true that trees with protectors are better off in the vast majority of cases than trees without any protection. While many of these claims are supposedly backed up by data, the data are often presented in a biased or incomplete way. The people who make such purchases often do so after listening to manufacturer claims and little else. Every year people who plant trees install millions of tree protectors.
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