Sudden death Knockout rose

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Sudden death Knockout rose

Post by Wanda » Tue Jul 10, 2012 9:31 am

I planted a Knockout 'Radrazz' 3 years ago which grew & bloomed wonderfully as they usually do around here. A week ago it was beautiful & healthy. One day later the whole bush was wilted and continued to do so until all that remains now is a 5 ft. mound of 'shredded wheat'. The bush is completely dried & dead.

Location is western side of house about 3-4 ft. from the foundation, on the corner. There are many tall trees 20-30' away which shade it from hot afternoon sun. I have not uprooted it yet. Plan to soon and hopefully will find something that will give me a clue as to the problem. What could be the cause of such an incident? There are several other Knockouts on the property doing fine.

I am assuming it is something systemic (?) A wilt?

Thanks for any help!

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Re: Sudden death Knockout rose

Post by lorijones » Fri Jul 27, 2012 3:47 pm

It could be a sudden death wilt. 'Radrazz' is a good variety. It is most likely a root problem. When you pull up the rose, check the roots for vole damage which could cause this type of quick wilting and death. It is not a typical rose disease.
If you plant another rose to replace this one, plant it in another location.

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