Quote:
Originally Posted by Patihum
Dixondale has a page for onion diseases with pictures.
http://www.dixondalefarms.com/diseases
If you don't find anything there I'd send them a picture and ask. I would imagine they've seen it all.
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This link confirms that onions get powdery mildew. I am not growing any this year in my small yard as I cannot get them far enough away from the tomatoes.