Last fall early October I was given 5 rose cuttings and told by the lady who grew many beautiful roses to just stick them in the soil. This is zone 5, Toronto area. They seemed to stay green, and some time in December I placed cut off milk bottles over them. Two had died by spring, the others looked O.K. But then the canes slowly started to turn brown. The one in the 2nd picture looked O.K. , but a big hosta started to crowd it out, so we moved it. Then it dropped the leaves and is now also turning brown. The one in the last pic has new growth, is still green except for a brown ring at the top.
What am I doing wrong ?
Can I still rescue something ?