A Rabbit damage generally is most prevalent during the first two to three years after planting. The primary seasons for inflicting that damage are the fall and winter. A Putting this around plantings usually is effective. The 1-inch mesh keeps bunnies from reaching through the wire. A Of course, if snowdrifts cover the fence, the critters will still be able to get in, to chew on your trees.
Homemade protectors can be as simple as chicken wire columns, formed around individual plants.
If you mow weedy areas near your seedlings, that will discourage rabbits. Several commercial products are available. They may be the easiest alternatives for protecting large plantings.