How should I overwinter a rose growing in a pot?
A rose growing in a pot may be destroyed if the potted rose is left on a deck or patio over winter. Potting soil temperatures in containers left above ground are likely to get extremely cold, damaging or destroying the roots of the rose.
To protect a potted rose, dig a hole in the ground in a sheltered location. Set the pot in the ground and then place soil around the pot. Place additional soil over the rose covering the bottom 6 to 8 inches of the rose canes.
Potted miniature roses can also be brought indoors before a hard freeze in fall and placed in a south or west-facing window and maintained as a houseplant.