I have used tree tubes with good results. Not as expensive or intrusive as large area fencing. Not effective for all species of trees and shrubs as those with low bushy growth tend not to work as well. I have used
Protex Tree Tubes. The 48" or even better, the 60" tubes should be used. They also protect the tree from rodents and definitely increase the growth rate.
They also make a tape that has a scent that repels deer to keep deer out of food plot until it is established called
PLOTSAVER. I have not personally used it, but a couple friends have with good results.
