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Comfrey- mildew magnet??

Posts: 225
Location: Western Washington State
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 I have comfrey growing abundantly in my garden.  Most has spread of its own accord.  Towards the end of the bloom, they all develop a powdery mildew/fungus.  Each are in different locations. different soil, air circulation, etc., but all get the mildew.   I hate to drop it as mulch or compost it, for fear of spreading the mildew.
 Any thoughts??
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Posts: 68
Location: Netherlands (moderate maritime climate)
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Although it has been dry and warm here in the southern parts of the Netherlands, I have the same experience with fungus on my comfrey plants. It is not the powdery mildew.

But I still chop it down, cut the stems smaller and use it as topdressing on the dried leaves mulch of my raspberry plants. Up to now the raspberries do fine and are not affected.
Posts: 1595
Location: Los Angeles, CA
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Interesting.  i've never had mildew on comfrey, even when it's right beside other plants like pumpkins or goji berry that easily mildew.

You mention that its spread of its own accord.  Most people only use Bocking 4 or Bocking 14 varieties of comfrey because it doesn't spread by seed, only by root cuttings.  Perhaps sterile comfrey (like I've got in my food forest) isn''t prone to mildew.
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