I am located in Chicago where temratures stays in sub-zero during winter. Planted 6 tree roses around 3 feet high last year, bloomed during summer then winter came by. covered the plants with tarp and protected roots with extra mulch. None of the plants recovered during spring 2010 and was no sign of any recovery, so cut the stem 3 inch high from the bottom. Some of the plants now have started growing from the roots.
Question: How do I care them to get the flower this year and protect them for the next year?