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[cg] Hardy Hibiscus/Rose Mallow

Any assistance will be appreciated.  

I have grown the hardy Hibiscus for several years now and occasionally will 
have the following occur.
1.  one main cane will suddenly wilt over a 24 hour period.
2.  within a day or so, another cane will wilt.
3.  within a week or so, the entire plant will be gone.  

I have replanted, in the same spot, to only have the same thing happen again 
to the new plant next year.   

I have been told that Japanese Beetles and Aphids are problems with these 
plants.  Early in July, this year, when I had a cane wilt on a plant, I 
treated the soil for Japanese Beetles.  I lost one additional cane, but have 
not lost any others for over a week now.  

Since this seems to occur only in spots, I tend to believe that there is 
something localized in certain areas.  

If anyone has any thoughts, I would be more than appreciative.  

Thank you in advance.

Marcia Geiser

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