Once a seedling is transplanted outdoors, a plastic, opaque one gallon milk container with the cap off and the bottom cut off can be placed bottom-side down over the transplanted seedling. Pile a little dirt around the base to prevent the container from blowing away or purchase the pre cut wire that is used to hold fiberglass insulation in place, bend the wire into a sharp "U", place the wire through the handle, and anchor the wire in the ground. After about 2 days cut a little away from the top. Cut several times more at about 2 day intervals until the containers look like those pictured above. The container protects the seedling from sun burn and wind until the seedling adjusts to the outside environment.. In my area (zone 5, northern Ohio) I find that a week to a week and a half of protection is sufficient. If you are bothered by rabbits, you can leave the containers in place to discourage them (at least the containers should prevent the rabbits from eating the plant down to ground level), or you can make little protective circles out of plastic black gutter guard to put around each rose, I find that the plastic gutter "cages" are ideal to use as places to attach a second label. The "cages" are anchored by stiff wire that I purchase from stores such as Home Depot that is intended to hold fiberglass insulation between studs in walls.