I purchased a home with some beautiful Rose bushes last year and not knowing until they did not bud this spring did not perform any preparation for winter. I live in the cold climate and I fear that they may not have made it through the past coldest winter in 20 years. Only one of the smaller bushes are showing any sign of life with the stems at the ground level turning green. The rest look dead. It it a fore gone conclusion that that they perished, or do I wait a little longer?