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dead areas in sweet allysum #656727

Asked June 27, 2020, 10:53 AM EDT

What is it? What to do

Somerset County Maryland

Expert Response

Sweet alyssum likes it cool. If it is too hot, you may get dieback. In that case, sheer it back short. It should come back happily when weather cools at the end of summer into fall.  

It's also possible that it is infected with Southern blight, a fungal disease. That is more problematic. Here is more about that: https://extension.umd.edu/hgic/topics/southern-blight
Look for the sclerotia and follow the directions carefully. 

 Ellen

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