Cactus Rot?

Discussion in 'Cacti and Succulents' started by strhythm, Nov 2, 2019.

  1. strhythm

    strhythm Apprentice Gardener

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    I just discovered these black spots on my cactus and was wondering if someone would be able to tell me what they are and how they are caused
    I read it might be due to chemicals? As I recently used dish washing liquid in water to get 'repel' some flies (as told by a florist) I thought that might be the cause, but is there a way to treat it and is it harmful?IMG-20191102-WA0003.jpegIMG-20191102-WA0002.jpeg
     
  2. pete

    pete Growing a bit of this and a bit of that....

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    Definitely looks like some kind of rot, unfortunately it could be a big problem.
    If you can stop it progressing it will always be a bad scar on the plant.

    Is it in the house or in a greenhouse?
    The composts looks a bit too water retentive, which is not good and it needs to be moved to a dryer atmosphere
     
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    • Mike Allen

      Mike Allen Total Gardener

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      Google. cactus rot caused by washing up liquid. Lots of info.
       
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