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singer1342

Inherited very old roses with disease and pest issues

singer1342
5 years ago

Hello,


I recently moved into a home with extremely old roses. The home was built in the 1920s and these roses look to be a similar vintage. I live out of Portland, Oregon where issues of black spot and rusty mildew are constant and these roses are covered in both. I'm working on remedying multiple issues as I also discovered rose borers on many of the old trimmed back canes. Do you have any suggestions as to how I can cut these back without killing them? I know in order to get rid of the borers I need to cut to fresh cane but it is now June and I'm worried about trimming them back going into summer.


Another issue I ran into was on a beautiful yellow rose. This bush has a root ball that is about six inches wide and partially hollow. The hollowed out piece looks like some kind of pest must've caused the damage. Any suggestions on what to do? The rose bush looks good otherwise but I'm concerned it will break and wondering if there is a way to stop the rot.


Thanks in advance for your help!


Sincerely,


Rae

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