Knock Out Rose Recovery
In the summer of 2004, I planted a Knockout Rose on the east side of my house. It did very well with little maintenance other than water and some plant food. I did no trimming other than removing dead buds. In The spring/summer of 2005 it exploded with new growth and flowers, again I did very little. However, in the spring/summer of 2006, the plant appeared very sickly and has only a tiny bit of new growth. I have since cut back all of the branches that appeared dead, leaving my plant with only two health looking (green) stems. Is this plant beyond help? Should I cut it back even more, or move on?
Also, in the future, how much pruning should I do in the late summer/early fall?